22121020100200 has 144 divisors (see below), whose sum is σ = 62977190407200. Its totient is φ = 7185173385600.

The previous prime is 22121020100183. The next prime is 22121020100209. The reversal of 22121020100200 is 200102012122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22121020100209) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 59215036 + ... + 59587435.

It is an arithmetic number, because the mean of its divisors is an integer number (437341600050).

Almost surely, 2^{22121020100200} is an apocalyptic number.

22121020100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121020100200 is an abundant number, since it is smaller than the sum of its proper divisors (40856170307000).

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

22121020100200 is a wasteful number, since it uses less digits than its factorization.

22121020100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118802520 (or 118802504 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22121020100200 its reverse (200102012122), we get a palindrome (22321122112322).

The spelling of 22121020100200 in words is "twenty-two trillion, one hundred twenty-one billion, twenty million, one hundred thousand, two hundred".