123211201323251 has 2 divisors, whose sum is σ = 123211201323252. Its totient is φ = 123211201323250.

The previous prime is 123211201323167. The next prime is 123211201323257. The reversal of 123211201323251 is 152323102112321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123211201323251 - 2³⁸ = 122936323416307 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (123211201323257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61605600661625 + 61605600661626.

It is an arithmetic number, because the mean of its divisors is an integer number (61605600661626).

Almost surely, 2^{123211201323251} is an apocalyptic number.

123211201323251 is a deficient number, since it is larger than the sum of its proper divisors (1).

123211201323251 is an equidigital number, since it uses as much as digits as its factorization.

123211201323251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 123211201323251 its reverse (152323102112321), we get a palindrome (275534303435572).

The spelling of 123211201323251 in words is "one hundred twenty-three trillion, two hundred eleven billion, two hundred one million, three hundred twenty-three thousand, two hundred fifty-one".