31313220112 has 10 divisors (see below), whose sum is σ = 60669363998. Its totient is φ = 15656610048.

The previous prime is 31313220083. The next prime is 31313220121. The reversal of 31313220112 is 21102231313.

It can be written as a sum of positive squares in only one way, i.e., 20725633296 + 10587586816 = 143964^2 + 102896^2 .

It is a super-2 number, since 2×31313220112² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31313220112.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978538113 + ... + 978538144.

Almost surely, 2^31313220112 is an apocalyptic number.

It is an amenable number.

31313220112 is a deficient number, since it is larger than the sum of its proper divisors (29356143886).

31313220112 is a wasteful number, since it uses less digits than its factorization.

31313220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957076265 (or 1957076259 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31313220112 its reverse (21102231313), we get a palindrome (52415451425).

The spelling of 31313220112 in words is "thirty-one billion, three hundred thirteen million, two hundred twenty thousand, one hundred twelve".