20102202202221 has 12 divisors (see below), whose sum is σ = 29198729458080. Its totient is φ = 13326599596680.

The previous prime is 20102202202169. The next prime is 20102202202241. The reversal of 20102202202221 is 12220220220102.

20102202202221 is a `hidden beast` number, since 2 + 0 + 1 + 0 + 220 + 220 + 2 + 221 = 666.

It is not a de Polignac number, because 20102202202221 - 2²² = 20102198007917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20102202202194 and 20102202202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102202202241) 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, 6239043145 + ... + 6239046366.

It is an arithmetic number, because the mean of its divisors is an integer number (2433227454840).

Almost surely, 2^{20102202202221} is an apocalyptic number.

It is an amenable number.

20102202202221 is a deficient number, since it is larger than the sum of its proper divisors (9096527255859).

20102202202221 is a wasteful number, since it uses less digits than its factorization.

20102202202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12478089696 (or 12478089693 counting only the distinct ones).

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

Adding to 20102202202221 its reverse (12220220220102), we get a palindrome (32322422422323).

The spelling of 20102202202221 in words is "twenty trillion, one hundred two billion, two hundred two million, two hundred two thousand, two hundred twenty-one".