31012122001 has 24 divisors (see below), whose sum is σ = 37257096960. Its totient is φ = 25723760832.

The previous prime is 31012121953. The next prime is 31012122047. The reversal of 31012122001 is 10022121013.

It is not a de Polignac number, because 31012122001 - 2⁷ = 31012121873 is a prime.

It is a super-2 number, since 2×31012122001² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31012126001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129316 + ... + 280618.

It is an arithmetic number, because the mean of its divisors is an integer number (1552379040).

Almost surely, 2^31012122001 is an apocalyptic number.

It is an amenable number.

31012122001 is a deficient number, since it is larger than the sum of its proper divisors (6244974959).

31012122001 is a wasteful number, since it uses less digits than its factorization.

31012122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151453 (or 151446 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31012122001 its reverse (10022121013), we get a palindrome (41034243014).

The spelling of 31012122001 in words is "thirty-one billion, twelve million, one hundred twenty-two thousand, one".