121155966 has 32 divisors (see below), whose sum is σ = 273262080. Its totient is φ = 39781368.

The previous prime is 121155961. The next prime is 121156003. The reversal of 121155966 is 669551121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121155966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121155961) 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, 13126 + ... + 20361.

It is an arithmetic number, because the mean of its divisors is an integer number (8539440).

Almost surely, 2^121155966 is an apocalyptic number.

121155966 is an abundant number, since it is smaller than the sum of its proper divisors (152106114).

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

121155966 is a wasteful number, since it uses less digits than its factorization.

121155966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33565 (or 33559 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 121155966 is about 11007.0870806040. The cubic root of 121155966 is about 494.8211658851.

It can be divided in two parts, 12115 and 5966, that added together give a palindrome (18081).

The spelling of 121155966 in words is "one hundred twenty-one million, one hundred fifty-five thousand, nine hundred sixty-six".