122531421 has 4 divisors (see below), whose sum is σ = 163375232. Its totient is φ = 81687612.

The previous prime is 122531413. The next prime is 122531429. The reversal of 122531421 is 124135221.

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.

It is an interprime number because it is at equal distance from previous prime (122531413) and next prime (122531429).

It is not a de Polignac number, because 122531421 - 2³ = 122531413 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 (122531429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20421901 + ... + 20421906.

It is an arithmetic number, because the mean of its divisors is an integer number (40843808).

Almost surely, 2^122531421 is an apocalyptic number.

It is an amenable number.

122531421 is a deficient number, since it is larger than the sum of its proper divisors (40843811).

122531421 is an equidigital number, since it uses as much as digits as its factorization.

122531421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40843810.

The product of its digits is 480, while the sum is 21.

The square root of 122531421 is about 11069.3911756700. The cubic root of 122531421 is about 496.6866533004.

Adding to 122531421 its reverse (124135221), we get a palindrome (246666642).

The spelling of 122531421 in words is "one hundred twenty-two million, five hundred thirty-one thousand, four hundred twenty-one".