122621100 has 72 divisors (see below), whose sum is σ = 405474048. Its totient is φ = 28027200.

The previous prime is 122621099. The next prime is 122621111. The reversal of 122621100 is 1126221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 122621100.

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, 27096 + ... + 31295.

It is an arithmetic number, because the mean of its divisors is an integer number (5631584).

Almost surely, 2^122621100 is an apocalyptic number.

122621100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122621100 is an abundant number, since it is smaller than the sum of its proper divisors (282852948).

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

122621100 is a wasteful number, since it uses less digits than its factorization.

122621100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58415 (or 58408 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 122621100 is about 11073.4411995549. The cubic root of 122621100 is about 496.8077963775.

Adding to 122621100 its reverse (1126221), we get a palindrome (123747321).

The spelling of 122621100 in words is "one hundred twenty-two million, six hundred twenty-one thousand, one hundred".