123311220211211 has 2 divisors, whose sum is σ = 123311220211212. Its totient is φ = 123311220211210.

The previous prime is 123311220211139. The next prime is 123311220211237. The reversal of 123311220211211 is 112112022113321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123311220211211 - 2⁴² = 118913173700107 is a prime.

It is not a weakly prime, because it can be changed into another prime (123311220211271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61655610105605 + 61655610105606.

It is an arithmetic number, because the mean of its divisors is an integer number (61655610105606).

Almost surely, 2^{123311220211211} is an apocalyptic number.

123311220211211 is a deficient number, since it is larger than the sum of its proper divisors (1).

123311220211211 is an equidigital number, since it uses as much as digits as its factorization.

123311220211211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 123311220211211 its reverse (112112022113321), we get a palindrome (235423242324532).

The spelling of 123311220211211 in words is "one hundred twenty-three trillion, three hundred eleven billion, two hundred twenty million, two hundred eleven thousand, two hundred eleven".