220000002021 has 8 divisors (see below), whose sum is σ = 325925928960. Its totient is φ = 146666667996.

The previous prime is 220000001999. The next prime is 220000002059. The reversal of 220000002021 is 120200000022.

It is not a de Polignac number, because 220000002021 - 2⁹ = 220000001509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 220000001994 and 220000002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220000002121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4074074085 + ... + 4074074138.

It is an arithmetic number, because the mean of its divisors is an integer number (40740741120).

Almost surely, 2^220000002021 is an apocalyptic number.

It is an amenable number.

220000002021 is a deficient number, since it is larger than the sum of its proper divisors (105925926939).

220000002021 is an equidigital number, since it uses as much as digits as its factorization.

220000002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8148148232 (or 8148148226 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 220000002021 its reverse (120200000022), we get a palindrome (340200002043).

The spelling of 220000002021 in words is "two hundred twenty billion, two thousand, twenty-one".