212021112231 has 12 divisors (see below), whose sum is σ = 306293203008. Its totient is φ = 141328722624.

The previous prime is 212021112229. The next prime is 212021112239. The reversal of 212021112231 is 132211120212.

212021112231 is a `hidden beast` number, since 212 + 0 + 211 + 12 + 231 = 666.

It is not a de Polignac number, because 212021112231 - 2¹ = 212021112229 is a prime.

It is a super-2 number, since 2×212021112231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021112239) 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, 1485090 + ... + 1621583.

It is an arithmetic number, because the mean of its divisors is an integer number (25524433584).

Almost surely, 2^212021112231 is an apocalyptic number.

212021112231 is a deficient number, since it is larger than the sum of its proper divisors (94272090777).

212021112231 is a wasteful number, since it uses less digits than its factorization.

212021112231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114262 (or 3114259 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 212021112231 its reverse (132211120212), we get a palindrome (344232232443).

The spelling of 212021112231 in words is "two hundred twelve billion, twenty-one million, one hundred twelve thousand, two hundred thirty-one".