21102020312023 has 16 divisors (see below), whose sum is σ = 25200142571520. Its totient is φ = 17276972556096.

The previous prime is 21102020312003. The next prime is 21102020312029. The reversal of 21102020312023 is 32021302020112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21102020312023 is a prime.

It is a super-2 number, since 2×21102020312023² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102020312029) 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, 91030590 + ... + 91262107.

It is an arithmetic number, because the mean of its divisors is an integer number (1575008910720).

Almost surely, 2^{21102020312023} is an apocalyptic number.

21102020312023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21102020312023 is a deficient number, since it is larger than the sum of its proper divisors (4098122259497).

21102020312023 is a wasteful number, since it uses less digits than its factorization.

21102020312023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182293446.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21102020312023 its reverse (32021302020112), we get a palindrome (53123322332135).

The spelling of 21102020312023 in words is "twenty-one trillion, one hundred two billion, twenty million, three hundred twelve thousand, twenty-three".