213211321232131 has 4 divisors (see below), whose sum is σ = 213677866793272. Its totient is φ = 212744775670992.

The previous prime is 213211321232101. The next prime is 213211321232149. The reversal of 213211321232131 is 131232123112312.

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

It is a cyclic number.

It is not a de Polignac number, because 213211321232131 - 2⁵ = 213211321232099 is a prime.

It is a super-2 number, since 2×213211321232131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213211321232131.

It is not an unprimeable number, because it can be changed into a prime (213211321232101) 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, 233272779885 + ... + 233272780798.

It is an arithmetic number, because the mean of its divisors is an integer number (53419466698318).

Almost surely, 2^{213211321232131} is an apocalyptic number.

213211321232131 is a deficient number, since it is larger than the sum of its proper divisors (466545561141).

213211321232131 is an equidigital number, since it uses as much as digits as its factorization.

213211321232131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466545561140.

The product of its digits is 2592, while the sum is 28.

Adding to 213211321232131 its reverse (131232123112312), we get a palindrome (344443444344443).

The spelling of 213211321232131 in words is "two hundred thirteen trillion, two hundred eleven billion, three hundred twenty-one million, two hundred thirty-two thousand, one hundred thirty-one".