22020120010021 has 4 divisors (see below), whose sum is σ = 25165851440032. Its totient is φ = 18874388580012.

The previous prime is 22020120009983. The next prime is 22020120010027. The reversal of 22020120010021 is 12001002102022.

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 not a de Polignac number, because 22020120010021 - 2⁷ = 22020120009893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22020120009983 and 22020120010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020120010027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1572865714995 + ... + 1572865715008.

It is an arithmetic number, because the mean of its divisors is an integer number (6291462860008).

Almost surely, 2^{22020120010021} is an apocalyptic number.

It is an amenable number.

22020120010021 is a deficient number, since it is larger than the sum of its proper divisors (3145731430011).

22020120010021 is an equidigital number, since it uses as much as digits as its factorization.

22020120010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145731430010.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22020120010021 its reverse (12001002102022), we get a palindrome (34021122112043).

The spelling of 22020120010021 in words is "twenty-two trillion, twenty billion, one hundred twenty million, ten thousand, twenty-one".