20020102221 has 32 divisors (see below), whose sum is σ = 32065671168. Its totient is φ = 10862755200.

The previous prime is 20020102177. The next prime is 20020102231. The reversal of 20020102221 is 12220102002.

It is not a de Polignac number, because 20020102221 - 2⁹ = 20020101709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020102197 and 20020102206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020102231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85105 + ... + 217446.

It is an arithmetic number, because the mean of its divisors is an integer number (1002052224).

Almost surely, 2^20020102221 is an apocalyptic number.

20020102221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20020102221 is a deficient number, since it is larger than the sum of its proper divisors (12045568947).

20020102221 is a wasteful number, since it uses less digits than its factorization.

20020102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302721.

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

Adding to 20020102221 its reverse (12220102002), we get a palindrome (32240204223).

The spelling of 20020102221 in words is "twenty billion, twenty million, one hundred two thousand, two hundred twenty-one".