213112332131 has 4 divisors (see below), whose sum is σ = 213117538872. Its totient is φ = 213107125392.

The previous prime is 213112332109. The next prime is 213112332187. The reversal of 213112332131 is 131233211312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213112332131 is a prime.

It is a super-2 number, since 2×213112332131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213112332097 and 213112332106.

It is not an unprimeable number, because it can be changed into a prime (213112332101) 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, 2541485 + ... + 2623998.

It is an arithmetic number, because the mean of its divisors is an integer number (53279384718).

Almost surely, 2^213112332131 is an apocalyptic number.

213112332131 is a deficient number, since it is larger than the sum of its proper divisors (5206741).

213112332131 is an equidigital number, since it uses as much as digits as its factorization.

213112332131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206740.

The product of its digits is 648, while the sum is 23.

Adding to 213112332131 its reverse (131233211312), we get a palindrome (344345543443).

The spelling of 213112332131 in words is "two hundred thirteen billion, one hundred twelve million, three hundred thirty-two thousand, one hundred thirty-one".