31020010021021 has 8 divisors (see below), whose sum is σ = 35540738364800. Its totient is φ = 26521606262448.

The previous prime is 31020010020899. The next prime is 31020010021037. The reversal of 31020010021021 is 12012001002013.

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

It is a cyclic number.

It is not a de Polignac number, because 31020010021021 - 2¹⁹ = 31020009496733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020010020992 and 31020010021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020010021061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5581143321 + ... + 5581148878.

It is an arithmetic number, because the mean of its divisors is an integer number (4442592295600).

Almost surely, 2^{31020010021021} is an apocalyptic number.

It is an amenable number.

31020010021021 is a deficient number, since it is larger than the sum of its proper divisors (4520728343779).

31020010021021 is a wasteful number, since it uses less digits than its factorization.

31020010021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11162292603.

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

Adding to 31020010021021 its reverse (12012001002013), we get a palindrome (43032011023034).

The spelling of 31020010021021 in words is "thirty-one trillion, twenty billion, ten million, twenty-one thousand, twenty-one".