202021010023 has 4 divisors (see below), whose sum is σ = 230881154320. Its totient is φ = 173160865728.

The previous prime is 202021010011. The next prime is 202021010027. The reversal of 202021010023 is 320010120202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202021010023 - 2⁹ = 202021009511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202021009985 and 202021010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021010027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14430072138 + ... + 14430072151.

It is an arithmetic number, because the mean of its divisors is an integer number (57720288580).

Almost surely, 2^202021010023 is an apocalyptic number.

202021010023 is a deficient number, since it is larger than the sum of its proper divisors (28860144297).

202021010023 is an equidigital number, since it uses as much as digits as its factorization.

202021010023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28860144296.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 202021010023 its reverse (320010120202), we get a palindrome (522031130225).

It can be divided in two parts, 20202 and 1010023, that added together give a square (1030225 = 1015²).

The spelling of 202021010023 in words is "two hundred two billion, twenty-one million, ten thousand, twenty-three".