31220110312 has 64 divisors (see below), whose sum is σ = 61498440000. Its totient is φ = 14838050304.

The previous prime is 31220110267. The next prime is 31220110321. The reversal of 31220110312 is 21301102213.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11565939 + ... + 11568637.

It is an arithmetic number, because the mean of its divisors is an integer number (960913125).

Almost surely, 2^31220110312 is an apocalyptic number.

It is an amenable number.

31220110312 is a deficient number, since it is larger than the sum of its proper divisors (30278329688).

31220110312 is a wasteful number, since it uses less digits than its factorization.

31220110312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490 (or 3486 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31220110312 its reverse (21301102213), we get a palindrome (52521212525).

The spelling of 31220110312 in words is "thirty-one billion, two hundred twenty million, one hundred ten thousand, three hundred twelve".