31232123201 has 2 divisors, whose sum is σ = 31232123202. Its totient is φ = 31232123200.

The previous prime is 31232123113. The next prime is 31232123249. The reversal of 31232123201 is 10232123213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27077031601 + 4155091600 = 164551^2 + 64460^2 .

It is a cyclic number.

It is not a de Polignac number, because 31232123201 - 2³⁴ = 14052254017 is a prime.

It is not a weakly prime, because it can be changed into another prime (31232123261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15616061600 + 15616061601.

It is an arithmetic number, because the mean of its divisors is an integer number (15616061601).

Almost surely, 2^31232123201 is an apocalyptic number.

It is an amenable number.

31232123201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31232123201 is an equidigital number, since it uses as much as digits as its factorization.

31232123201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31232123201 its reverse (10232123213), we get a palindrome (41464246414).

The spelling of 31232123201 in words is "thirty-one billion, two hundred thirty-two million, one hundred twenty-three thousand, two hundred one".