121131992 has 16 divisors (see below), whose sum is σ = 239076600. Its totient is φ = 57378240.

The previous prime is 121131991. The next prime is 121132001. The reversal of 121131992 is 299131121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121131991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398309 + ... + 398612.

Almost surely, 2^121131992 is an apocalyptic number.

It is an amenable number.

121131992 is a deficient number, since it is larger than the sum of its proper divisors (117944608).

121131992 is a wasteful number, since it uses less digits than its factorization.

121131992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796946 (or 796942 counting only the distinct ones).

The product of its digits is 972, while the sum is 29.

The square root of 121131992 is about 11005.9980010901. The cubic root of 121131992 is about 494.7885257943.

The spelling of 121131992 in words is "one hundred twenty-one million, one hundred thirty-one thousand, nine hundred ninety-two".