122115900 has 72 divisors (see below), whose sum is σ = 359167984. Its totient is φ = 32025600.

The previous prime is 122115883. The next prime is 122115923. The reversal of 122115900 is 9511221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14964 + ... + 21636.

Almost surely, 2^122115900 is an apocalyptic number.

122115900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122115900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179583992).

122115900 is an abundant number, since it is smaller than the sum of its proper divisors (237052084).

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

122115900 is a wasteful number, since it uses less digits than its factorization.

122115900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6751 (or 6744 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 122115900 is about 11050.6063182072. The cubic root of 122115900 is about 496.1245730720.

The spelling of 122115900 in words is "one hundred twenty-two million, one hundred fifteen thousand, nine hundred".