21202202012112 has 120 divisors (see below), whose sum is σ = 64740190121568. Its totient is φ = 6423994080000.

The previous prime is 21202202012111. The next prime is 21202202012161. The reversal of 21202202012112 is 21121020220212.

It is a happy number.

21202202012112 is a `hidden beast` number, since 212 + 0 + 220 + 20 + 1 + 211 + 2 = 666.

It is a super-2 number, since 2×21202202012112² (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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202202012111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10205862 + ... + 12106362.

Almost surely, 2^{21202202012112} is an apocalyptic number.

21202202012112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21202202012112 is an abundant number, since it is smaller than the sum of its proper divisors (43537988109456).

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

21202202012112 is a wasteful number, since it uses less digits than its factorization.

21202202012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907569 (or 1907560 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21202202012112 its reverse (21121020220212), we get a palindrome (42323222232324).

The spelling of 21202202012112 in words is "twenty-one trillion, two hundred two billion, two hundred two million, twelve thousand, one hundred twelve".