20112200002100 has 72 divisors (see below), whose sum is σ = 43671311758200. Its totient is φ = 8039750284800.

The previous prime is 20112200002021. The next prime is 20112200002129. The reversal of 20112200002100 is 120000221102.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 2774736388516 + 17337463613584 = 1665754^2 + 4163828^2 .

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, 1975459010 + ... + 1975469190.

Almost surely, 2^{20112200002100} is an apocalyptic number.

20112200002100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112200002100 is an abundant number, since it is smaller than the sum of its proper divisors (23559111756100).

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

20112200002100 is a wasteful number, since it uses less digits than its factorization.

20112200002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20853 (or 20846 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20112200002100 its reverse (120000221102), we get a palindrome (20232200223202).

The spelling of 20112200002100 in words is "twenty trillion, one hundred twelve billion, two hundred million, two thousand, one hundred".