213123211203213 has 48 divisors (see below), whose sum is σ = 315665619250176. Its totient is φ = 138497897905920.

The previous prime is 213123211203157. The next prime is 213123211203229. The reversal of 213123211203213 is 312302112321312.

213123211203213 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 2 + 321 + 12 + 0 + 321 + 3 = 666.

It is not a de Polignac number, because 213123211203213 - 2¹⁴ = 213123211186829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213123211203113) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117236395 + ... + 119040407.

It is an arithmetic number, because the mean of its divisors is an integer number (6576367067712).

Almost surely, 2^{213123211203213} is an apocalyptic number.

It is an amenable number.

213123211203213 is a deficient number, since it is larger than the sum of its proper divisors (102542408046963).

213123211203213 is a wasteful number, since it uses less digits than its factorization.

213123211203213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805194 (or 1805191 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 213123211203213 its reverse (312302112321312), we get a palindrome (525425323524525).

The spelling of 213123211203213 in words is "two hundred thirteen trillion, one hundred twenty-three billion, two hundred eleven million, two hundred three thousand, two hundred thirteen".