22121211200 has 84 divisors (see below), whose sum is σ = 59380416672. Its totient is φ = 8044070400.

The previous prime is 22121211181. The next prime is 22121211209. The reversal of 22121211200 is 211212122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121211209) 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, 610844 + ... + 646043.

Almost surely, 2^22121211200 is an apocalyptic number.

22121211200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121211200 is an abundant number, since it is smaller than the sum of its proper divisors (37259205472).

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

22121211200 is a wasteful number, since it uses less digits than its factorization.

22121211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256920 (or 1256905 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22121211200 its reverse (211212122), we get a palindrome (22332423322).

The spelling of 22121211200 in words is "twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred".