121930688 has 112 divisors (see below), whose sum is σ = 281683968. Its totient is φ = 51840000.

The previous prime is 121930667. The next prime is 121930693. The reversal of 121930688 is 886039121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 807413 + ... + 807563.

Almost surely, 2^121930688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121930688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140841984).

121930688 is an abundant number, since it is smaller than the sum of its proper divisors (159753280).

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

121930688 is a wasteful number, since it uses less digits than its factorization.

121930688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 121930688 is about 11042.2229646027. Note that the first 3 decimals coincide. The cubic root of 121930688 is about 495.8736237172.

The spelling of 121930688 in words is "one hundred twenty-one million, nine hundred thirty thousand, six hundred eighty-eight".