212013031231 has 4 divisors (see below), whose sum is σ = 212067551200. Its totient is φ = 211958511264.

The previous prime is 212013031193. The next prime is 212013031247. The reversal of 212013031231 is 132130310212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212013031231 - 2⁷ = 212013031103 is a prime.

It is a super-2 number, since 2×212013031231² (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 = 212013031199 and 212013031208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212013031291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27254151 + ... + 27261928.

It is an arithmetic number, because the mean of its divisors is an integer number (53016887800).

Almost surely, 2^212013031231 is an apocalyptic number.

212013031231 is a deficient number, since it is larger than the sum of its proper divisors (54519969).

212013031231 is an equidigital number, since it uses as much as digits as its factorization.

212013031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54519968.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 212013031231 its reverse (132130310212), we get a palindrome (344143341443).

The spelling of 212013031231 in words is "two hundred twelve billion, thirteen million, thirty-one thousand, two hundred thirty-one".