20012212021100 has 288 divisors, whose sum is σ = 50267657455680. Its totient is φ = 6853848514560.

The previous prime is 20012212021007. The next prime is 20012212021111. The reversal of 20012212021100 is 112021221002.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 246984194 + ... + 247065206.

Almost surely, 2^{20012212021100} is an apocalyptic number.

20012212021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012212021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25133828727840).

20012212021100 is an abundant number, since it is smaller than the sum of its proper divisors (30255445434580).

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

20012212021100 is a wasteful number, since it uses less digits than its factorization.

20012212021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81269 (or 81262 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20012212021100 its reverse (112021221002), we get a palindrome (20124233242102).

The spelling of 20012212021100 in words is "twenty trillion, twelve billion, two hundred twelve million, twenty-one thousand, one hundred".