20021100100212 has 24 divisors (see below), whose sum is σ = 47709855559296. Its totient is φ = 6531706415488.

The previous prime is 20021100100151. The next prime is 20021100100223. The reversal of 20021100100212 is 21200100112002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17749201653 + ... + 17749202780.

It is an arithmetic number, because the mean of its divisors is an integer number (1987910648304).

Almost surely, 2^{20021100100212} is an apocalyptic number.

It is an amenable number.

20021100100212 is an abundant number, since it is smaller than the sum of its proper divisors (27688755459084).

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

20021100100212 is a wasteful number, since it uses less digits than its factorization.

20021100100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35498404487 (or 35498404485 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021100100212 its reverse (21200100112002), we get a palindrome (41221200212214).

The spelling of 20021100100212 in words is "twenty trillion, twenty-one billion, one hundred million, one hundred thousand, two hundred twelve".