22221220100120 has 16 divisors (see below), whose sum is σ = 49997745225360. Its totient is φ = 8888488040032.

The previous prime is 22221220100087. The next prime is 22221220100129. The reversal of 22221220100120 is 2100102212222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221220100129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277765251212 + ... + 277765251291.

It is an arithmetic number, because the mean of its divisors is an integer number (3124859076585).

Almost surely, 2^{22221220100120} is an apocalyptic number.

22221220100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221220100120 is an abundant number, since it is smaller than the sum of its proper divisors (27776525125240).

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

22221220100120 is a wasteful number, since it uses less digits than its factorization.

22221220100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555530502514 (or 555530502510 counting only the distinct ones).

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

Adding to 22221220100120 its reverse (2100102212222), we get a palindrome (24321322312342).

The spelling of 22221220100120 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty million, one hundred thousand, one hundred twenty".