2202221220021 has 24 divisors (see below), whose sum is σ = 3267317430624. Its totient is φ = 1428311011680.

The previous prime is 2202221220013. The next prime is 2202221220071. The reversal of 2202221220021 is 1200221222022.

2202221220021 is a `hidden beast` number, since 2 + 202 + 221 + 220 + 0 + 21 = 666.

It is not a de Polignac number, because 2202221220021 - 2³ = 2202221220013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2202221219976 and 2202221220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202221220071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2714226 + ... + 3430956.

It is an arithmetic number, because the mean of its divisors is an integer number (136138226276).

Almost surely, 2^{2202221220021} is an apocalyptic number.

It is an amenable number.

2202221220021 is a deficient number, since it is larger than the sum of its proper divisors (1065096210603).

2202221220021 is a wasteful number, since it uses less digits than its factorization.

2202221220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726001 (or 725998 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2202221220021 its reverse (1200221222022), we get a palindrome (3402442442043).

It can be divided in two parts, 2202221 and 220021, that added together give a palindrome (2422242).

The spelling of 2202221220021 in words is "two trillion, two hundred two billion, two hundred twenty-one million, two hundred twenty thousand, twenty-one".