31020011021013 has 32 divisors (see below), whose sum is σ = 47583977932800. Its totient is φ = 17607461054400.

The previous prime is 31020011021009. The next prime is 31020011021039. The reversal of 31020011021013 is 31012011002013.

It is a happy number.

It is not a de Polignac number, because 31020011021013 - 2² = 31020011021009 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31020011020983 and 31020011021001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020011021093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66832206 + ... + 67294752.

It is an arithmetic number, because the mean of its divisors is an integer number (1486999310400).

Almost surely, 2^{31020011021013} is an apocalyptic number.

It is an amenable number.

31020011021013 is a deficient number, since it is larger than the sum of its proper divisors (16563966911787).

31020011021013 is a wasteful number, since it uses less digits than its factorization.

31020011021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483857.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31020011021013 its reverse (31012011002013), we get a palindrome (62032022023026).

The spelling of 31020011021013 in words is "thirty-one trillion, twenty billion, eleven million, twenty-one thousand, thirteen".