212213231131 has 16 divisors (see below), whose sum is σ = 253030514688. Its totient is φ = 175715625600.

The previous prime is 212213231107. The next prime is 212213231141. The reversal of 212213231131 is 131132312212.

It is a cyclic number.

It is not a de Polignac number, because 212213231131 - 2¹⁷ = 212213100059 is a prime.

It is a super-2 number, since 2×212213231131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212213231141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18297915 + ... + 18309508.

It is an arithmetic number, because the mean of its divisors is an integer number (15814407168).

Almost surely, 2^212213231131 is an apocalyptic number.

212213231131 is a deficient number, since it is larger than the sum of its proper divisors (40817283557).

212213231131 is a wasteful number, since it uses less digits than its factorization.

212213231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36607482.

The product of its digits is 432, while the sum is 22.

Adding to 212213231131 its reverse (131132312212), we get a palindrome (343345543343).

It can be divided in two parts, 212213 and 231131, that added together give a palindrome (443344).

The spelling of 212213231131 in words is "two hundred twelve billion, two hundred thirteen million, two hundred thirty-one thousand, one hundred thirty-one".