102023020021 has 24 divisors (see below), whose sum is σ = 111335091840. Its totient is φ = 93443328576.

The previous prime is 102023020019. The next prime is 102023020051. The reversal of 102023020021 is 120020320201.

It is not a de Polignac number, because 102023020021 - 2¹ = 102023020019 is a prime.

It is a super-2 number, since 2×102023020021² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102023019983 and 102023020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102023020051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22258896 + ... + 22263478.

It is an arithmetic number, because the mean of its divisors is an integer number (4638962160).

Almost surely, 2^102023020021 is an apocalyptic number.

It is an amenable number.

102023020021 is a deficient number, since it is larger than the sum of its proper divisors (9312071819).

102023020021 is a wasteful number, since it uses less digits than its factorization.

102023020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5605 (or 5592 counting only the distinct ones).

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

Adding to 102023020021 its reverse (120020320201), we get a palindrome (222043340222).

The spelling of 102023020021 in words is "one hundred two billion, twenty-three million, twenty thousand, twenty-one".