212333312231 has 16 divisors (see below), whose sum is σ = 217018401600. Its totient is φ = 207688250880.

The previous prime is 212333312227. The next prime is 212333312267. The reversal of 212333312231 is 132213333212.

It is a cyclic number.

It is not a de Polignac number, because 212333312231 - 2² = 212333312227 is a prime.

It is a super-2 number, since 2×212333312231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212333312231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212333312221) 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, 29336345 + ... + 29343581.

It is an arithmetic number, because the mean of its divisors is an integer number (13563650100).

Almost surely, 2^212333312231 is an apocalyptic number.

212333312231 is a deficient number, since it is larger than the sum of its proper divisors (4685089369).

212333312231 is a wasteful number, since it uses less digits than its factorization.

212333312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9914.

The product of its digits is 3888, while the sum is 26.

Adding to 212333312231 its reverse (132213333212), we get a palindrome (344546645443).

The spelling of 212333312231 in words is "two hundred twelve billion, three hundred thirty-three million, three hundred twelve thousand, two hundred thirty-one".