121123440 has 60 divisors (see below), whose sum is σ = 406775304. Its totient is φ = 32299392.

The previous prime is 121123439. The next prime is 121123489. The reversal of 121123440 is 44321121.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83394 + ... + 84833.

Almost surely, 2^121123440 is an apocalyptic number.

121123440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121123440 is an abundant number, since it is smaller than the sum of its proper divisors (285651864).

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

121123440 is a wasteful number, since it uses less digits than its factorization.

121123440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168246 (or 168237 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121123440 is about 11005.6094788067. The cubic root of 121123440 is about 494.7768813862.

Adding to 121123440 its reverse (44321121), we get a palindrome (165444561).

The spelling of 121123440 in words is "one hundred twenty-one million, one hundred twenty-three thousand, four hundred forty".