22120221021200 has 30 divisors (see below), whose sum is σ = 53143831004394. Its totient is φ = 8848088408320.

The previous prime is 22120221021191. The next prime is 22120221021289. The reversal of 22120221021200 is 212012202122.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1789933597456 + 20330287423744 = 1337884^2 + 4508912^2 .

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, 27650275877 + ... + 27650276676.

Almost surely, 2^{22120221021200} is an apocalyptic number.

22120221021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22120221021200 is an abundant number, since it is smaller than the sum of its proper divisors (31023609983194).

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

22120221021200 is a wasteful number, since it uses less digits than its factorization.

22120221021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55300552571 (or 55300552560 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22120221021200 its reverse (212012202122), we get a palindrome (22332233223322).

The spelling of 22120221021200 in words is "twenty-two trillion, one hundred twenty billion, two hundred twenty-one million, twenty-one thousand, two hundred".