20211222211100 has 18 divisors (see below), whose sum is σ = 43858352198304. Its totient is φ = 8084488884400.

The previous prime is 20211222211097. The next prime is 20211222211133. The reversal of 20211222211100 is 111222211202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101056110956 + ... + 101056111155.

It is an arithmetic number, because the mean of its divisors is an integer number (2436575122128).

Almost surely, 2^{20211222211100} is an apocalyptic number.

20211222211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211222211100 is an abundant number, since it is smaller than the sum of its proper divisors (23647129987204).

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

20211222211100 is a wasteful number, since it uses less digits than its factorization.

20211222211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202112222125 (or 202112222118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20211222211100 its reverse (111222211202), we get a palindrome (20322444422302).

The spelling of 20211222211100 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, two hundred eleven thousand, one hundred".