123211201321213 has 2 divisors, whose sum is σ = 123211201321214. Its totient is φ = 123211201321212.

The previous prime is 123211201321193. The next prime is 123211201321249. The reversal of 123211201321213 is 312123102112321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123127496416089 + 83704905124 = 11096283^2 + 289318^2 .

It is a cyclic number.

It is not a de Polignac number, because 123211201321213 - 2⁵ = 123211201321181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123211201351213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61605600660606 + 61605600660607.

It is an arithmetic number, because the mean of its divisors is an integer number (61605600660607).

Almost surely, 2^{123211201321213} is an apocalyptic number.

It is an amenable number.

123211201321213 is a deficient number, since it is larger than the sum of its proper divisors (1).

123211201321213 is an equidigital number, since it uses as much as digits as its factorization.

123211201321213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 123211201321213 its reverse (312123102112321), we get a palindrome (435334303433534).

The spelling of 123211201321213 in words is "one hundred twenty-three trillion, two hundred eleven billion, two hundred one million, three hundred twenty-one thousand, two hundred thirteen".