20212211111100 has 36 divisors (see below), whose sum is σ = 58480664148984. Its totient is φ = 5389922962880.

The previous prime is 20212211111077. The next prime is 20212211111117. The reversal of 20212211111100 is 111111221202.

It is a happy number.

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 20212211111100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33687018219 + ... + 33687018818.

Almost surely, 2^{20212211111100} is an apocalyptic number.

20212211111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212211111100 is an abundant number, since it is smaller than the sum of its proper divisors (38268453037884).

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

20212211111100 is a wasteful number, since it uses less digits than its factorization.

20212211111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67374037054 (or 67374037047 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20212211111100 its reverse (111111221202), we get a palindrome (20323322332302).

The spelling of 20212211111100 in words is "twenty trillion, two hundred twelve billion, two hundred eleven million, one hundred eleven thousand, one hundred".