220021000002 has 24 divisors (see below), whose sum is σ = 494368173936. Its totient is φ = 73340333172.

The previous prime is 220020999953. The next prime is 220021000009. The reversal of 220021000002 is 200000120022.

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

It is not an unprimeable number, because it can be changed into a prime (220021000009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226358568 + ... + 226359539.

It is an arithmetic number, because the mean of its divisors is an integer number (20598673914).

Almost surely, 2^220021000002 is an apocalyptic number.

220021000002 is an abundant number, since it is smaller than the sum of its proper divisors (274347173934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220021000002 is an equidigital number, since it uses as much as digits as its factorization.

220021000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452718124 (or 452718112 counting only the distinct ones).

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

Adding to 220021000002 its reverse (200000120022), we get a palindrome (420021120024).

The spelling of 220021000002 in words is "two hundred twenty billion, twenty-one million, two", and thus it is an aban number.