212011231131 has 36 divisors (see below), whose sum is σ = 374985865800. Its totient is φ = 114772992768.

The previous prime is 212011231097. The next prime is 212011231153. The reversal of 212011231131 is 131132110212.

212011231131 is a `hidden beast` number, since 212 + 0 + 112 + 311 + 31 = 666.

It is not a de Polignac number, because 212011231131 - 2¹³ = 212011222939 is a prime.

It is a super-2 number, since 2×212011231131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212011231231) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12642966 + ... + 12659723.

It is an arithmetic number, because the mean of its divisors is an integer number (10416274050).

Almost surely, 2^212011231131 is an apocalyptic number.

212011231131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212011231131 is a deficient number, since it is larger than the sum of its proper divisors (162974634669).

212011231131 is a wasteful number, since it uses less digits than its factorization.

212011231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25302728 (or 25302718 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 212011231131 its reverse (131132110212), we get a palindrome (343143341343).

The spelling of 212011231131 in words is "two hundred twelve billion, eleven million, two hundred thirty-one thousand, one hundred thirty-one".