22221100200120 has 128 divisors (see below), whose sum is σ = 71664914764800. Its totient is φ = 5494310078976.

The previous prime is 22221100200053. The next prime is 22221100200121. The reversal of 22221100200120 is 2100200112222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22221100200120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221100200121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103574719 + ... + 103789038.

It is an arithmetic number, because the mean of its divisors is an integer number (559882146600).

Almost surely, 2^{22221100200120} is an apocalyptic number.

22221100200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221100200120 is an abundant number, since it is smaller than the sum of its proper divisors (49443814564680).

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

22221100200120 is a wasteful number, since it uses less digits than its factorization.

22221100200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207363837 (or 207363833 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22221100200120 its reverse (2100200112222), we get a palindrome (24321300312342).

The spelling of 22221100200120 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred million, two hundred thousand, one hundred twenty".