31220220032412 has 24 divisors (see below), whose sum is σ = 72847325031936. Its totient is φ = 10406719302768.

The previous prime is 31220220032401. The next prime is 31220220032453. The reversal of 31220220032412 is 21423002202213.

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, 4461333 + ... + 9074355.

It is an arithmetic number, because the mean of its divisors is an integer number (3035305209664).

Almost surely, 2^{31220220032412} is an apocalyptic number.

It is an amenable number.

31220220032412 is an abundant number, since it is smaller than the sum of its proper divisors (41627104999524).

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

31220220032412 is a wasteful number, since it uses less digits than its factorization.

31220220032412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5177017 (or 5177015 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31220220032412 its reverse (21423002202213), we get a palindrome (52643222234625).

The spelling of 31220220032412 in words is "thirty-one trillion, two hundred twenty billion, two hundred twenty million, thirty-two thousand, four hundred twelve".