31222311322212 has 36 divisors (see below), whose sum is σ = 78923352109056. Its totient is φ = 10407399211440.

The previous prime is 31222311322193. The next prime is 31222311322243. The reversal of 31222311322212 is 21222311322213.

31222311322212 is a `hidden beast` number, since 3 + 1 + 2 + 2 + 2 + 311 + 322 + 21 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×31222311322212² (a number of 28 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9512293 + ... + 12366419.

Almost surely, 2^{31222311322212} is an apocalyptic number.

It is an amenable number.

31222311322212 is an abundant number, since it is smaller than the sum of its proper divisors (47701040786844).

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

31222311322212 is a wasteful number, since it uses less digits than its factorization.

31222311322212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158008 (or 3158003 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 31222311322212 its reverse (21222311322213), we get a palindrome (52444622644425).

Subtracting from 31222311322212 its reverse (21222311322213), we obtain a palindrome (9999999999999).

The spelling of 31222311322212 in words is "thirty-one trillion, two hundred twenty-two billion, three hundred eleven million, three hundred twenty-two thousand, two hundred twelve".