122312431 has 2 divisors, whose sum is σ = 122312432. Its totient is φ = 122312430.

The previous prime is 122312423. The next prime is 122312447. The reversal of 122312431 is 134213221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122312431 - 2³ = 122312423 is a prime.

It is a super-2 number, since 2×122312431² = 29920661554259522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122312399 and 122312408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122312131) 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 as a sum of consecutive naturals, namely, 61156215 + 61156216.

It is an arithmetic number, because the mean of its divisors is an integer number (61156216).

Almost surely, 2^122312431 is an apocalyptic number.

122312431 is a deficient number, since it is larger than the sum of its proper divisors (1).

122312431 is an equidigital number, since it uses as much as digits as its factorization.

122312431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 19.

The square root of 122312431 is about 11059.4950608063. The cubic root of 122312431 is about 496.3905815613.

Adding to 122312431 its reverse (134213221), we get a palindrome (256525652).

The spelling of 122312431 in words is "one hundred twenty-two million, three hundred twelve thousand, four hundred thirty-one".