12212002100020 has 72 divisors (see below), whose sum is σ = 26223734839176. Its totient is φ = 4776765244416.

The previous prime is 12212002100009. The next prime is 12212002100033. The reversal of 12212002100020 is 2000120021221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5421996076324 + 6790006023696 = 2328518^2 + 2605764^2 .

It is a congruent number.

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, 11803432 + ... + 12796288.

It is an arithmetic number, because the mean of its divisors is an integer number (364218539433).

Almost surely, 2^{12212002100020} is an apocalyptic number.

12212002100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212002100020 is an abundant number, since it is smaller than the sum of its proper divisors (14011732739156).

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

12212002100020 is a wasteful number, since it uses less digits than its factorization.

12212002100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993137 (or 993068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12212002100020 its reverse (2000120021221), we get a palindrome (14212122121241).

The spelling of 12212002100020 in words is "twelve trillion, two hundred twelve billion, two million, one hundred thousand, twenty".