22100210021220 has 96 divisors (see below), whose sum is σ = 63129716278272. Its totient is φ = 5774712473088.

The previous prime is 22100210021207. The next prime is 22100210021221. The reversal of 22100210021220 is 2212001200122.

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 22100210021220.

It is not an unprimeable number, because it can be changed into a prime (22100210021221) 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, 2037172 + ... + 6953451.

It is an arithmetic number, because the mean of its divisors is an integer number (657601211232).

Almost surely, 2^{22100210021220} is an apocalyptic number.

22100210021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22100210021220 is an abundant number, since it is smaller than the sum of its proper divisors (41029506257052).

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

22100210021220 is a wasteful number, since it uses less digits than its factorization.

22100210021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8991461 (or 8991459 counting only the distinct ones).

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

Adding to 22100210021220 its reverse (2212001200122), we get a palindrome (24312211221342).

The spelling of 22100210021220 in words is "twenty-two trillion, one hundred billion, two hundred ten million, twenty-one thousand, two hundred twenty".