21020202102222 has 64 divisors (see below), whose sum is σ = 48084091292160. Its totient is φ = 6802805846592.

The previous prime is 21020202102203. The next prime is 21020202102241. The reversal of 21020202102222 is 22220120202012.

21020202102222 is a `hidden beast` number, since 210 + 2 + 0 + 20 + 210 + 2 + 222 = 666.

It is an interprime number because it is at equal distance from previous prime (21020202102203) and next prime (21020202102241).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21020202102195 and 21020202102204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26715903 + ... + 27491450.

It is an arithmetic number, because the mean of its divisors is an integer number (751313926440).

Almost surely, 2^{21020202102222} is an apocalyptic number.

21020202102222 is an abundant number, since it is smaller than the sum of its proper divisors (27063889189938).

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

21020202102222 is a wasteful number, since it uses less digits than its factorization.

21020202102222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54207574 (or 54207568 counting only the distinct ones).

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

Adding to 21020202102222 its reverse (22220120202012), we get a palindrome (43240322304234).

The spelling of 21020202102222 in words is "twenty-one trillion, twenty billion, two hundred two million, one hundred two thousand, two hundred twenty-two".