20112021212100 has 108 divisors (see below), whose sum is σ = 61815120964464. Its totient is φ = 5047722949120.

The previous prime is 20112021212071. The next prime is 20112021212111. The reversal of 20112021212100 is 121212021102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20112021212100.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 115899582 + ... + 116072981.

Almost surely, 2^{20112021212100} is an apocalyptic number.

20112021212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112021212100 is an abundant number, since it is smaller than the sum of its proper divisors (41703099752364).

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

20112021212100 is a wasteful number, since it uses less digits than its factorization.

20112021212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231972614 (or 231972590 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20112021212100 its reverse (121212021102), we get a palindrome (20233233233202).

The spelling of 20112021212100 in words is "twenty trillion, one hundred twelve billion, twenty-one million, two hundred twelve thousand, one hundred".