21010331023 has 8 divisors (see below), whose sum is σ = 22948019280. Its totient is φ = 19077252480.

The previous prime is 21010331021. The next prime is 21010331039. The reversal of 21010331023 is 32013301012.

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

It is not a de Polignac number, because 21010331023 - 2¹ = 21010331021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010330988 and 21010331006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010331021) 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, 1142890 + ... + 1161127.

It is an arithmetic number, because the mean of its divisors is an integer number (2868502410).

Almost surely, 2^21010331023 is an apocalyptic number.

21010331023 is a deficient number, since it is larger than the sum of its proper divisors (1937688257).

21010331023 is a wasteful number, since it uses less digits than its factorization.

21010331023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304857.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21010331023 its reverse (32013301012), we get a palindrome (53023632035).

The spelling of 21010331023 in words is "twenty-one billion, ten million, three hundred thirty-one thousand, twenty-three".