21202112111202 has 64 divisors (see below), whose sum is σ = 51412811788800. Its totient is φ = 6423163442640.

The previous prime is 21202112111101. The next prime is 21202112111207. The reversal of 21202112111202 is 20211121120212.

21202112111202 is a `hidden beast` number, since 2 + 120 + 211 + 211 + 120 + 2 = 666.

It is a super-2 number, since 2×21202112111202² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (21202112111207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2552208 + ... + 6994139.

It is an arithmetic number, because the mean of its divisors is an integer number (803325184200).

Almost surely, 2^{21202112111202} is an apocalyptic number.

21202112111202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21202112111202 is an abundant number, since it is smaller than the sum of its proper divisors (30210699677598).

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

21202112111202 is a wasteful number, since it uses less digits than its factorization.

21202112111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9550108 (or 9550102 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21202112111202 its reverse (20211121120212), we get a palindrome (41413233231414).

The spelling of 21202112111202 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, one hundred eleven thousand, two hundred two".