122621015421 has 12 divisors (see below), whose sum is σ = 177123118848. Its totient is φ = 81745555464.

The previous prime is 122621015417. The next prime is 122621015423. The reversal of 122621015421 is 124510126221.

It is a happy number.

122621015421 is a `hidden beast` number, since 1 + 2 + 2 + 621 + 0 + 15 + 4 + 21 = 666.

It is not a de Polignac number, because 122621015421 - 2² = 122621015417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122621015423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 386626 + ... + 628268.

It is an arithmetic number, because the mean of its divisors is an integer number (14760259904).

Almost surely, 2^122621015421 is an apocalyptic number.

It is an amenable number.

122621015421 is a deficient number, since it is larger than the sum of its proper divisors (54502103427).

122621015421 is a wasteful number, since it uses less digits than its factorization.

122621015421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298032 (or 298029 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The spelling of 122621015421 in words is "one hundred twenty-two billion, six hundred twenty-one million, fifteen thousand, four hundred twenty-one".