22321212111200 has 72 divisors (see below), whose sum is σ = 55148185243368. Its totient is φ = 8820912711680.

The previous prime is 22321212111199. The next prime is 22321212111221. The reversal of 22321212111200 is 211121212322.

It is a super-3 number, since 3×22321212111200³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

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, 168015017 + ... + 168147816.

It is an arithmetic number, because the mean of its divisors is an integer number (765947017269).

Almost surely, 2^{22321212111200} is an apocalyptic number.

22321212111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22321212111200 is an abundant number, since it is smaller than the sum of its proper divisors (32826973132168).

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

22321212111200 is a wasteful number, since it uses less digits than its factorization.

22321212111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336162936 (or 336162923 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 22321212111200 its reverse (211121212322), we get a palindrome (22532333323522).

The spelling of 22321212111200 in words is "twenty-two trillion, three hundred twenty-one billion, two hundred twelve million, one hundred eleven thousand, two hundred".