31023101021 has 16 divisors (see below), whose sum is σ = 34190095680. Its totient is φ = 27914584320.

The previous prime is 31023101009. The next prime is 31023101059. The reversal of 31023101021 is 12010132013.

It is a cyclic number.

It is not a de Polignac number, because 31023101021 - 2¹⁰ = 31023099997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31023100987 and 31023101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023101071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 901691 + ... + 935463.

It is an arithmetic number, because the mean of its divisors is an integer number (2136880980).

Almost surely, 2^31023101021 is an apocalyptic number.

It is an amenable number.

31023101021 is a deficient number, since it is larger than the sum of its proper divisors (3166994659).

31023101021 is a wasteful number, since it uses less digits than its factorization.

31023101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34636.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31023101021 its reverse (12010132013), we get a palindrome (43033233034).

The spelling of 31023101021 in words is "thirty-one billion, twenty-three million, one hundred one thousand, twenty-one".