121907994 has 32 divisors (see below), whose sum is σ = 266281344. Its totient is φ = 36980160.

The previous prime is 121907953. The next prime is 121907999. The reversal of 121907994 is 499709121.

It is a super-2 number, since 2×121907994² = 29723118002208072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121907999) 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, 5469 + ... + 16544.

It is an arithmetic number, because the mean of its divisors is an integer number (8321292).

Almost surely, 2^121907994 is an apocalyptic number.

121907994 is an abundant number, since it is smaller than the sum of its proper divisors (144373350).

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

121907994 is a wasteful number, since it uses less digits than its factorization.

121907994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22102.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 121907994 is about 11041.1953157256. The cubic root of 121907994 is about 495.8428574558.

The spelling of 121907994 in words is "one hundred twenty-one million, nine hundred seven thousand, nine hundred ninety-four".