123211201223213 has 4 divisors (see below), whose sum is σ = 125535940868988. Its totient is φ = 120886461577440.

The previous prime is 123211201223207. The next prime is 123211201223233. The reversal of 123211201223213 is 312322102112321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74097973888324 + 49113227334889 = 8608018^2 + 7008083^2 .

It is a cyclic number.

It is not a de Polignac number, because 123211201223213 - 2³⁴ = 123194021354029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123211201223203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1162369822808 + ... + 1162369822913.

It is an arithmetic number, because the mean of its divisors is an integer number (31383985217247).

Almost surely, 2^{123211201223213} is an apocalyptic number.

It is an amenable number.

123211201223213 is a deficient number, since it is larger than the sum of its proper divisors (2324739645775).

123211201223213 is an equidigital number, since it uses as much as digits as its factorization.

123211201223213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2324739645774.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 123211201223213 its reverse (312322102112321), we get a palindrome (435533303335534).

The spelling of 123211201223213 in words is "one hundred twenty-three trillion, two hundred eleven billion, two hundred one million, two hundred twenty-three thousand, two hundred thirteen".