22101220212100 has 36 divisors (see below), whose sum is σ = 47960091056500. Its totient is φ = 8840406389760.

The previous prime is 22101220212061. The next prime is 22101220212109. The reversal of 22101220212100 is 121202210122.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3854790343044 + 18246429869056 = 1963362^2 + 4271584^2 .

It is not an unprimeable number, because it can be changed into a prime (22101220212109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10501036 + ... + 12428764.

Almost surely, 2^{22101220212100} is an apocalyptic number.

22101220212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22101220212100 is an abundant number, since it is smaller than the sum of its proper divisors (25858870844400).

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

22101220212100 is a wasteful number, since it uses less digits than its factorization.

22101220212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042392 (or 2042385 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22101220212100 its reverse (121202210122), we get a palindrome (22222422422222).

The spelling of 22101220212100 in words is "twenty-two trillion, one hundred one billion, two hundred twenty million, two hundred twelve thousand, one hundred".