212103311231 has 12 divisors (see below), whose sum is σ = 253401313872. Its totient is φ = 173898363936.

The previous prime is 212103311201. The next prime is 212103311263. The reversal of 212103311231 is 132113301212.

It is a happy number.

It is not a de Polignac number, because 212103311231 - 2¹⁴ = 212103294847 is a prime.

It is a super-2 number, since 2×212103311231² (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 (212103311201) 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, 28635686 + ... + 28643091.

It is an arithmetic number, because the mean of its divisors is an integer number (21116776156).

Almost surely, 2^212103311231 is an apocalyptic number.

212103311231 is a deficient number, since it is larger than the sum of its proper divisors (41298002641).

212103311231 is an equidigital number, since it uses as much as digits as its factorization.

212103311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57278830 (or 57278807 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 212103311231 its reverse (132113301212), we get a palindrome (344216612443).

The spelling of 212103311231 in words is "two hundred twelve billion, one hundred three million, three hundred eleven thousand, two hundred thirty-one".