212431212122 has 16 divisors (see below), whose sum is σ = 320429795400. Its totient is φ = 105621837888.

The previous prime is 212431212089. The next prime is 212431212143. The reversal of 212431212122 is 221212134212.

It can be written as a sum of positive squares in 4 ways, for example, as 199148880121 + 13282332001 = 446261^2 + 115249^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629588 + ... + 906224.

Almost surely, 2^212431212122 is an apocalyptic number.

212431212122 is a deficient number, since it is larger than the sum of its proper divisors (107998583278).

212431212122 is a wasteful number, since it uses less digits than its factorization.

212431212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278785.

The product of its digits is 768, while the sum is 23.

Adding to 212431212122 its reverse (221212134212), we get a palindrome (433643346334).

The spelling of 212431212122 in words is "two hundred twelve billion, four hundred thirty-one million, two hundred twelve thousand, one hundred twenty-two".