20220122021 has 16 divisors (see below), whose sum is σ = 22578144768. Its totient is φ = 17953580400.

The previous prime is 20220122011. The next prime is 20220122053. The reversal of 20220122021 is 12022102202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220122021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20220121987 and 20220122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220122011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37415 + ... + 204548.

It is an arithmetic number, because the mean of its divisors is an integer number (1411134048).

Almost surely, 2^20220122021 is an apocalyptic number.

It is an amenable number.

20220122021 is a deficient number, since it is larger than the sum of its proper divisors (2358022747).

20220122021 is a wasteful number, since it uses less digits than its factorization.

20220122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242152.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20220122021 its reverse (12022102202), we get a palindrome (32242224223).

It can be divided in two parts, 20220 and 122021, that added together give a palindrome (142241).

The spelling of 20220122021 in words is "twenty billion, two hundred twenty million, one hundred twenty-two thousand, twenty-one".