3111220312212 has 24 divisors (see below), whose sum is σ = 7259905025856. Its totient is φ = 1037017585408.

The previous prime is 3111220312171. The next prime is 3111220312217. The reversal of 3111220312212 is 2122130221113.

It is a super-3 number, since 3×3111220312212³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111220312217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6749088 + ... + 7195319.

It is an arithmetic number, because the mean of its divisors is an integer number (302496042744).

Almost surely, 2^{3111220312212} is an apocalyptic number.

It is an amenable number.

3111220312212 is an abundant number, since it is smaller than the sum of its proper divisors (4148684713644).

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

3111220312212 is a wasteful number, since it uses less digits than its factorization.

3111220312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13963007 (or 13963005 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 3111220312212 its reverse (2122130221113), we get a palindrome (5233350533325).

The spelling of 3111220312212 in words is "three trillion, one hundred eleven billion, two hundred twenty million, three hundred twelve thousand, two hundred twelve".