31122202111212 has 24 divisors (see below), whose sum is σ = 73148533433136. Its totient is φ = 10298344250368.

The previous prime is 31122202111159. The next prime is 31122202111243. The reversal of 31122202111212 is 21211120222113.

It is a super-2 number, since 2×31122202111212² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9465388293 + ... + 9465391580.

It is an arithmetic number, because the mean of its divisors is an integer number (3047855559714).

Almost surely, 2^{31122202111212} is an apocalyptic number.

It is an amenable number.

31122202111212 is an abundant number, since it is smaller than the sum of its proper divisors (42026331321924).

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

31122202111212 is a wasteful number, since it uses less digits than its factorization.

31122202111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18930780017 (or 18930780015 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 31122202111212 its reverse (21211120222113), we get a palindrome (52333322333325).

The spelling of 31122202111212 in words is "thirty-one trillion, one hundred twenty-two billion, two hundred two million, one hundred eleven thousand, two hundred twelve".