31220112322012 has 24 divisors (see below), whose sum is σ = 54660069126432. Its totient is φ = 15602950272000.

The previous prime is 31220112321991. The next prime is 31220112322027. The reversal of 31220112322012 is 21022321102213.

It is a super-3 number, since 3×31220112322012³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

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, 292267012 + ... + 292373812.

It is an arithmetic number, because the mean of its divisors is an integer number (2277502880268).

Almost surely, 2^{31220112322012} is an apocalyptic number.

It is an amenable number.

31220112322012 is a deficient number, since it is larger than the sum of its proper divisors (23439956804420).

31220112322012 is a wasteful number, since it uses less digits than its factorization.

31220112322012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139389 (or 139387 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31220112322012 its reverse (21022321102213), we get a palindrome (52242433424225).

The spelling of 31220112322012 in words is "thirty-one trillion, two hundred twenty billion, one hundred twelve million, three hundred twenty-two thousand, twelve".