31001131012 has 6 divisors (see below), whose sum is σ = 54251979278. Its totient is φ = 15500565504.

The previous prime is 31001130989. The next prime is 31001131037. The reversal of 31001131012 is 21013110013.

It can be written as a sum of positive squares in only one way, i.e., 23514382336 + 7486748676 = 153344^2 + 86526^2 .

It is a super-2 number, since 2×31001131012² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31001130983 and 31001131001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3875141373 + ... + 3875141380.

Almost surely, 2^31001131012 is an apocalyptic number.

It is an amenable number.

31001131012 is a deficient number, since it is larger than the sum of its proper divisors (23250848266).

31001131012 is a wasteful number, since it uses less digits than its factorization.

31001131012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7750282757 (or 7750282755 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31001131012 its reverse (21013110013), we get a palindrome (52014241025).

The spelling of 31001131012 in words is "thirty-one billion, one million, one hundred thirty-one thousand, twelve".