121165536 has 48 divisors (see below), whose sum is σ = 318729600. Its totient is φ = 40303488.

The previous prime is 121165531. The next prime is 121165553. The reversal of 121165536 is 635561121.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×121165536² = 29362174228334592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121165531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58405 + ... + 60443.

It is an arithmetic number, because the mean of its divisors is an integer number (6640200).

Almost surely, 2^121165536 is an apocalyptic number.

121165536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121165536 is an abundant number, since it is smaller than the sum of its proper divisors (197564064).

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

121165536 is a wasteful number, since it uses less digits than its factorization.

121165536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671 (or 2663 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 121165536 is about 11007.5217919385. The cubic root of 121165536 is about 494.8341940339.

The spelling of 121165536 in words is "one hundred twenty-one million, one hundred sixty-five thousand, five hundred thirty-six".