311233012212 has 12 divisors (see below), whose sum is σ = 726210361856. Its totient is φ = 103744337400.

The previous prime is 311233012177. The next prime is 311233012219. The reversal of 311233012212 is 212210332113.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×311233012212² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311233012219) 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, 12968042164 + ... + 12968042187.

Almost surely, 2^311233012212 is an apocalyptic number.

It is an amenable number.

311233012212 is an abundant number, since it is smaller than the sum of its proper divisors (414977349644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311233012212 is a wasteful number, since it uses less digits than its factorization.

311233012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25936084358 (or 25936084356 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 311233012212 its reverse (212210332113), we get a palindrome (523443344325).

The spelling of 311233012212 in words is "three hundred eleven billion, two hundred thirty-three million, twelve thousand, two hundred twelve".