20221023021 has 4 divisors (see below), whose sum is σ = 26961364032. Its totient is φ = 13480682012.

The previous prime is 20221023013. The next prime is 20221023073. The reversal of 20221023021 is 12032012202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20221023021 - 2³ = 20221023013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221023001) 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, 3370170501 + ... + 3370170506.

It is an arithmetic number, because the mean of its divisors is an integer number (6740341008).

Almost surely, 2^20221023021 is an apocalyptic number.

It is an amenable number.

20221023021 is a deficient number, since it is larger than the sum of its proper divisors (6740341011).

20221023021 is an equidigital number, since it uses as much as digits as its factorization.

20221023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6740341010.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20221023021 its reverse (12032012202), we get a palindrome (32253035223).

The spelling of 20221023021 in words is "twenty billion, two hundred twenty-one million, twenty-three thousand, twenty-one".