121152816 has 60 divisors (see below), whose sum is σ = 356912920. Its totient is φ = 38257920.

The previous prime is 121152803. The next prime is 121152839. The reversal of 121152816 is 618251121.

121152816 is a `hidden beast` number, since 121 + 1 + 528 + 16 = 666.

It is a super-3 number, since 3×121152816³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121152816.

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, 19405 + ... + 24876.

Almost surely, 2^121152816 is an apocalyptic number.

121152816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121152816 is an abundant number, since it is smaller than the sum of its proper divisors (235760104).

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

121152816 is a wasteful number, since it uses less digits than its factorization.

121152816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44314 (or 44305 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 121152816 is about 11006.9439900456. The cubic root of 121152816 is about 494.8168774729.

The spelling of 121152816 in words is "one hundred twenty-one million, one hundred fifty-two thousand, eight hundred sixteen".