21002212202202 has 48 divisors (see below), whose sum is σ = 56733248549952. Its totient is φ = 5455120052160.

The previous prime is 21002212202189. The next prime is 21002212202219. The reversal of 21002212202202 is 20220221220012.

21002212202202 is a `hidden beast` number, since 2 + 1 + 0 + 0 + 221 + 220 + 220 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7576554243 + ... + 7576557014.

It is an arithmetic number, because the mean of its divisors is an integer number (1181942678124).

Almost surely, 2^{21002212202202} is an apocalyptic number.

21002212202202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21002212202202 is an abundant number, since it is smaller than the sum of its proper divisors (35731036347750).

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

21002212202202 is a wasteful number, since it uses less digits than its factorization.

21002212202202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15153111283 (or 15153111280 counting only the distinct ones).

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

Adding to 21002212202202 its reverse (20220221220012), we get a palindrome (41222433422214).

The spelling of 21002212202202 in words is "twenty-one trillion, two billion, two hundred twelve million, two hundred two thousand, two hundred two".