121057818 has 32 divisors (see below), whose sum is σ = 278416896. Its totient is φ = 34373808.

The previous prime is 121057813. The next prime is 121057829. The reversal of 121057818 is 818750121.

It is a super-2 number, since 2×121057818² = 29309990597842248, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121057813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1996 + ... + 15687.

It is an arithmetic number, because the mean of its divisors is an integer number (8700528).

Almost surely, 2^121057818 is an apocalyptic number.

121057818 is an abundant number, since it is smaller than the sum of its proper divisors (157359078).

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

121057818 is a wasteful number, since it uses less digits than its factorization.

121057818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17858.

The product of its (nonzero) digits is 4480, while the sum is 33.

The square root of 121057818 is about 11002.6277770358. The cubic root of 121057818 is about 494.6875121890.

The spelling of 121057818 in words is "one hundred twenty-one million, fifty-seven thousand, eight hundred eighteen".