20212222221200 has 30 divisors (see below), whose sum is σ = 48559863887394. Its totient is φ = 8084888888320.

The previous prime is 20212222221197. The next prime is 20212222221223. The reversal of 20212222221200 is 212222221202.

It can be written as a sum of positive squares in 3 ways, for example, as 123754796944 + 20088467424256 = 351788^2 + 4482016^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 25265277377 + ... + 25265278176.

Almost surely, 2^{20212222221200} is an apocalyptic number.

20212222221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212222221200 is an abundant number, since it is smaller than the sum of its proper divisors (28347641666194).

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

20212222221200 is a wasteful number, since it uses less digits than its factorization.

20212222221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50530555571 (or 50530555560 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20212222221200 its reverse (212222221202), we get a palindrome (20424444442402).

The spelling of 20212222221200 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred".