122921075021 has 4 divisors (see below), whose sum is σ = 122922190944. Its totient is φ = 122919959100.

The previous prime is 122921075003. The next prime is 122921075023. The reversal of 122921075021 is 120570129221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 122921075021 - 2⁶ = 122921074957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122921075023) 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 3 ways as a sum of consecutive naturals, for example, 372095 + ... + 619916.

It is an arithmetic number, because the mean of its divisors is an integer number (30730547736).

Almost surely, 2^122921075021 is an apocalyptic number.

It is an amenable number.

122921075021 is a deficient number, since it is larger than the sum of its proper divisors (1115923).

122921075021 is an equidigital number, since it uses as much as digits as its factorization.

122921075021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115922.

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 122921075021 in words is "one hundred twenty-two billion, nine hundred twenty-one million, seventy-five thousand, twenty-one".