21020022203231 has 8 divisors (see below), whose sum is σ = 21278085548160. Its totient is φ = 20762073383832.

The previous prime is 21020022203227. The next prime is 21020022203249. The reversal of 21020022203231 is 13230222002012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21020022203231 - 2² = 21020022203227 is a prime.

It is a super-2 number, since 2×21020022203231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020022203281) 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, 28262021 + ... + 28996238.

It is an arithmetic number, because the mean of its divisors is an integer number (2659760693520).

Almost surely, 2^{21020022203231} is an apocalyptic number.

21020022203231 is a deficient number, since it is larger than the sum of its proper divisors (258063344929).

21020022203231 is an equidigital number, since it uses as much as digits as its factorization.

21020022203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57262765.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21020022203231 its reverse (13230222002012), we get a palindrome (34250244205243).

The spelling of 21020022203231 in words is "twenty-one trillion, twenty billion, twenty-two million, two hundred three thousand, two hundred thirty-one".