21002222120022 has 96 divisors (see below), whose sum is σ = 53461464376320. Its totient is φ = 5874608698560.

The previous prime is 21002222119987. The next prime is 21002222120051. The reversal of 21002222120022 is 22002122220012.

21002222120022 is a `hidden beast` number, since 210 + 0 + 222 + 212 + 0 + 0 + 22 = 666.

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 = 21002222119977 and 21002222120004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161631163 + ... + 161761049.

It is an arithmetic number, because the mean of its divisors is an integer number (556890253920).

Almost surely, 2^{21002222120022} is an apocalyptic number.

21002222120022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21002222120022 is an abundant number, since it is smaller than the sum of its proper divisors (32459242256298).

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

21002222120022 is a wasteful number, since it uses less digits than its factorization.

21002222120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192738 (or 192735 counting only the distinct ones).

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

Adding to 21002222120022 its reverse (22002122220012), we get a palindrome (43004344340034).

The spelling of 21002222120022 in words is "twenty-one trillion, two billion, two hundred twenty-two million, one hundred twenty thousand, twenty-two".