122715021 has 16 divisors (see below), whose sum is σ = 192225600. Its totient is φ = 68651520.

The previous prime is 122715013. The next prime is 122715029. The reversal of 122715021 is 120517221.

It is an interprime number because it is at equal distance from previous prime (122715013) and next prime (122715029).

It is not a de Polignac number, because 122715021 - 2³ = 122715013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122715029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142596 + ... + 143453.

It is an arithmetic number, because the mean of its divisors is an integer number (12014100).

Almost surely, 2^122715021 is an apocalyptic number.

122715021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122715021 is a deficient number, since it is larger than the sum of its proper divisors (69510579).

122715021 is a wasteful number, since it uses less digits than its factorization.

122715021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286076.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 122715021 is about 11077.6812104339. The cubic root of 122715021 is about 496.9346064641.

The spelling of 122715021 in words is "one hundred twenty-two million, seven hundred fifteen thousand, twenty-one".