121430016 has 168 divisors, whose sum is σ = 369731544. Its totient is φ = 39813120.

The previous prime is 121430009. The next prime is 121430017. The reversal of 121430016 is 610034121.

It is a happy number.

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

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121430017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1990626 + ... + 1990686.

It is an arithmetic number, because the mean of its divisors is an integer number (2200783).

Almost surely, 2^121430016 is an apocalyptic number.

121430016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121430016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184865772).

121430016 is an abundant number, since it is smaller than the sum of its proper divisors (248301528).

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

121430016 is an frugal number, since it uses more digits than its factorization.

121430016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 66 counting only the distinct ones).

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

The square root of 121430016 is about 11019.5288465524. The cubic root of 121430016 is about 495.1939735652.

Adding to 121430016 its reverse (610034121), we get a palindrome (731464137).

The spelling of 121430016 in words is "one hundred twenty-one million, four hundred thirty thousand, sixteen".