31212233221212 has 72 divisors (see below), whose sum is σ = 79030337205456. Its totient is φ = 10386586596864.

The previous prime is 31212233221207. The next prime is 31212233221237. The reversal of 31212233221212 is 21212233221213.

31212233221212 is a `hidden beast` number, since 3 + 1 + 2 + 1 + 223 + 3 + 221 + 212 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53275618 + ... + 53858294.

It is an arithmetic number, because the mean of its divisors is an integer number (1097643572298).

Almost surely, 2^{31212233221212} is an apocalyptic number.

It is an amenable number.

31212233221212 is an abundant number, since it is smaller than the sum of its proper divisors (47818103984244).

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

31212233221212 is a wasteful number, since it uses less digits than its factorization.

31212233221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585187 (or 585182 counting only the distinct ones).

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

Adding to 31212233221212 its reverse (21212233221213), we get a palindrome (52424466442425).

Subtracting from 31212233221212 its reverse (21212233221213), we obtain a palindrome (9999999999999).

The spelling of 31212233221212 in words is "thirty-one trillion, two hundred twelve billion, two hundred thirty-three million, two hundred twenty-one thousand, two hundred twelve".