22221210022100 has 72 divisors (see below), whose sum is σ = 51429173556600. Its totient is φ = 8304568913920.

The previous prime is 22221210022069. The next prime is 22221210022111. The reversal of 22221210022100 is 122001212222.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 2912954600644 + 19308255421456 = 1706738^2 + 4394116^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47472575 + ... + 47938374.

It is an arithmetic number, because the mean of its divisors is an integer number (714294077175).

Almost surely, 2^{22221210022100} is an apocalyptic number.

22221210022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221210022100 is an abundant number, since it is smaller than the sum of its proper divisors (29207963534500).

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

22221210022100 is a wasteful number, since it uses less digits than its factorization.

22221210022100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95411117 (or 95411110 counting only the distinct ones).

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

Adding to 22221210022100 its reverse (122001212222), we get a palindrome (22343211234322).

The spelling of 22221210022100 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred ten million, twenty-two thousand, one hundred".