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121331412 = 22331123439
BaseRepresentation
bin1110011101101…
…01111011010100
322110022021102000
413032311323110
5222030101122
620012315300
73002204616
oct716657324
9273267360
10121331412
11625410a4
1234772b30
131c1a1c47
1412184db6
15a9ba0ac
hex73b5ed4

121331412 has 24 divisors (see below), whose sum is σ = 314563200. Its totient is φ = 40443768.

The previous prime is 121331411. The next prime is 121331429. The reversal of 121331412 is 214133121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561612 + ... + 561827.

It is an arithmetic number, because the mean of its divisors is an integer number (13106800).

Almost surely, 2121331412 is an apocalyptic number.

121331412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121331412 is an abundant number, since it is smaller than the sum of its proper divisors (193231788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121331412 is a wasteful number, since it uses less digits than its factorization.

121331412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123452 (or 1123444 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 121331412 is about 11015.0538809395. The cubic root of 121331412 is about 495.0599009236.

Adding to 121331412 its reverse (214133121), we get a palindrome (335464533).

The spelling of 121331412 in words is "one hundred twenty-one million, three hundred thirty-one thousand, four hundred twelve".

Divisors: 1 2 3 4 6 9 12 18 27 36 54 108 1123439 2246878 3370317 4493756 6740634 10110951 13481268 20221902 30332853 40443804 60665706 121331412