20211222111200 has 72 divisors (see below), whose sum is σ = 49364848416240. Its totient is φ = 8080523264000.

The previous prime is 20211222111191. The next prime is 20211222111209. The reversal of 20211222111200 is 211122211202.

It is an interprime number because it is at equal distance from previous prime (20211222111191) and next prime (20211222111209).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211222111209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4564001 + ... + 7826400.

It is an arithmetic number, because the mean of its divisors is an integer number (685622894670).

Almost surely, 2^{20211222111200} is an apocalyptic number.

20211222111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211222111200 is an abundant number, since it is smaller than the sum of its proper divisors (29153626305040).

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

20211222111200 is a wasteful number, since it uses less digits than its factorization.

20211222111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12392460 (or 12392447 counting only the distinct ones).

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

Adding to 20211222111200 its reverse (211122211202), we get a palindrome (20422344322402).

The spelling of 20211222111200 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, one hundred eleven thousand, two hundred".