220002021021 has 4 divisors (see below), whose sum is σ = 293336028032. Its totient is φ = 146668014012.

The previous prime is 220002021017. The next prime is 220002021061. The reversal of 220002021021 is 120120200022.

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 220002021021 - 2² = 220002021017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220002020988 and 220002021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220002021061) 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, 36667003501 + ... + 36667003506.

It is an arithmetic number, because the mean of its divisors is an integer number (73334007008).

Almost surely, 2^220002021021 is an apocalyptic number.

It is an amenable number.

220002021021 is a deficient number, since it is larger than the sum of its proper divisors (73334007011).

220002021021 is an equidigital number, since it uses as much as digits as its factorization.

220002021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73334007010.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 220002021021 its reverse (120120200022), we get a palindrome (340122221043).

The spelling of 220002021021 in words is "two hundred twenty billion, two million, twenty-one thousand, twenty-one".