21023301122020 has 24 divisors (see below), whose sum is σ = 44149447150200. Its totient is φ = 8409222392832.

The previous prime is 21023301121967. The next prime is 21023301122081. The reversal of 21023301122020 is 2022110332012.

It can be written as a sum of positive squares in 4 ways, for example, as 5326300862884 + 15697000259136 = 2307878^2 + 3961944^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4357935 + ... + 7812694.

It is an arithmetic number, because the mean of its divisors is an integer number (1839560297925).

Almost surely, 2^{21023301122020} is an apocalyptic number.

21023301122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21023301122020 is an abundant number, since it is smaller than the sum of its proper divisors (23126146028180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21023301122020 is a wasteful number, since it uses less digits than its factorization.

21023301122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12257007 (or 12257005 counting only the distinct ones).

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

Adding to 21023301122020 its reverse (2022110332012), we get a palindrome (23045411454032).

The spelling of 21023301122020 in words is "twenty-one trillion, twenty-three billion, three hundred one million, one hundred twenty-two thousand, twenty".