31021013013 has 8 divisors (see below), whose sum is σ = 41476564800. Its totient is φ = 20623068288.

The previous prime is 31021012951. The next prime is 31021013027. The reversal of 31021013013 is 31031012013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31021013013 - 2¹⁸ = 31020750869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31021012983 and 31021013001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021513013) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 14400508 + ... + 14402661.

It is an arithmetic number, because the mean of its divisors is an integer number (5184570600).

Almost surely, 2^31021013013 is an apocalyptic number.

It is an amenable number.

31021013013 is a deficient number, since it is larger than the sum of its proper divisors (10455551787).

31021013013 is a wasteful number, since it uses less digits than its factorization.

31021013013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28803531.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31021013013 its reverse (31031012013), we get a palindrome (62052025026).

The spelling of 31021013013 in words is "thirty-one billion, twenty-one million, thirteen thousand, thirteen".