122199621 has 32 divisors (see below), whose sum is σ = 189527040. Its totient is φ = 69467904.

The previous prime is 122199617. The next prime is 122199629. The reversal of 122199621 is 126991221.

It is not a de Polignac number, because 122199621 - 2² = 122199617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122199629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19546 + ... + 25028.

It is an arithmetic number, because the mean of its divisors is an integer number (5922720).

Almost surely, 2^122199621 is an apocalyptic number.

It is an amenable number.

122199621 is a deficient number, since it is larger than the sum of its proper divisors (67327419).

122199621 is a wasteful number, since it uses less digits than its factorization.

122199621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5545.

The product of its digits is 3888, while the sum is 33.

The square root of 122199621 is about 11054.3937418567. The cubic root of 122199621 is about 496.2379259245.

The spelling of 122199621 in words is "one hundred twenty-two million, one hundred ninety-nine thousand, six hundred twenty-one".