22021102100 has 18 divisors (see below), whose sum is σ = 47785791774. Its totient is φ = 8808440800.

The previous prime is 22021102097. The next prime is 22021102127. The reversal of 22021102100 is 120112022.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 293162884 + 21727939216 = 17122^2 + 147404^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110105411 + ... + 110105610.

Almost surely, 2^22021102100 is an apocalyptic number.

22021102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021102100 is an abundant number, since it is smaller than the sum of its proper divisors (25764689674).

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

22021102100 is a wasteful number, since it uses less digits than its factorization.

22021102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220211035 (or 220211028 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22021102100 its reverse (120112022), we get a palindrome (22141214122).

The spelling of 22021102100 in words is "twenty-two billion, twenty-one million, one hundred two thousand, one hundred".