212423312331 has 12 divisors (see below), whose sum is σ = 307965904480. Its totient is φ = 141092973360.

The previous prime is 212423312281. The next prime is 212423312351. The reversal of 212423312331 is 133213324212.

212423312331 is a `hidden beast` number, since 2 + 1 + 2 + 423 + 3 + 1 + 233 + 1 = 666.

It is not a de Polignac number, because 212423312331 - 2⁹ = 212423311819 is a prime.

It is a super-2 number, since 2×212423312331² (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 = 212423312295 and 212423312304.

It is not an unprimeable number, because it can be changed into a prime (212423312351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43544776 + ... + 43549653.

Almost surely, 2^212423312331 is an apocalyptic number.

212423312331 is a deficient number, since it is larger than the sum of its proper divisors (95542592149).

212423312331 is a wasteful number, since it uses less digits than its factorization.

212423312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87094706 (or 87094703 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 212423312331 its reverse (133213324212), we get a palindrome (345636636543).

The spelling of 212423312331 in words is "two hundred twelve billion, four hundred twenty-three million, three hundred twelve thousand, three hundred thirty-one".