212021103231 has 16 divisors (see below), whose sum is σ = 358977529600. Its totient is φ = 121154916024.

The previous prime is 212021103211. The next prime is 212021103247. The reversal of 212021103231 is 132301120212.

It is not a de Polignac number, because 212021103231 - 2⁹ = 212021102719 is a prime.

It is a super-2 number, since 2×212021103231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021103211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560902201 + ... + 560902578.

It is an arithmetic number, because the mean of its divisors is an integer number (22436095600).

Almost surely, 2^212021103231 is an apocalyptic number.

212021103231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212021103231 is a deficient number, since it is larger than the sum of its proper divisors (146956426369).

212021103231 is a wasteful number, since it uses less digits than its factorization.

212021103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121804795 (or 1121804789 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212021103231 its reverse (132301120212), we get a palindrome (344322223443).

The spelling of 212021103231 in words is "two hundred twelve billion, twenty-one million, one hundred three thousand, two hundred thirty-one".