21031030302023 has 16 divisors (see below), whose sum is σ = 25150826376000. Its totient is φ = 17208460129536.

The previous prime is 21031030301987. The next prime is 21031030302041. The reversal of 21031030302023 is 32020303013012.

It is a cyclic number.

It is not a de Polignac number, because 21031030302023 - 2³² = 21026735334727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21031030301986 and 21031030302004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031030322023) 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, 766032398 + ... + 766059851.

It is an arithmetic number, because the mean of its divisors is an integer number (1571926648500).

Almost surely, 2^{21031030302023} is an apocalyptic number.

21031030302023 is a deficient number, since it is larger than the sum of its proper divisors (4119796073977).

21031030302023 is a wasteful number, since it uses less digits than its factorization.

21031030302023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532092346.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21031030302023 its reverse (32020303013012), we get a palindrome (53051333315035).

The spelling of 21031030302023 in words is "twenty-one trillion, thirty-one billion, thirty million, three hundred two thousand, twenty-three".