2022220021 has 4 divisors (see below), whose sum is σ = 2022983200. Its totient is φ = 2021456844.

The previous prime is 2022220019. The next prime is 2022220043. The reversal of 2022220021 is 1200222202.

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 2022220021 - 2¹ = 2022220019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2022219983 and 2022220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2022221021) 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, 377601 + ... + 382918.

It is an arithmetic number, because the mean of its divisors is an integer number (505745800).

Almost surely, 2^2022220021 is an apocalyptic number.

It is an amenable number.

2022220021 is a deficient number, since it is larger than the sum of its proper divisors (763179).

2022220021 is an equidigital number, since it uses as much as digits as its factorization.

2022220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763178.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2022220021 is about 44969.1007359498. The cubic root of 2022220021 is about 1264.5697883513.

Adding to 2022220021 its reverse (1200222202), we get a palindrome (3222442223).

The spelling of 2022220021 in words is "two billion, twenty-two million, two hundred twenty thousand, twenty-one".