21112221100122 has 24 divisors (see below), whose sum is σ = 45975344433876. Its totient is φ = 7001684153856.

The previous prime is 21112221100109. The next prime is 21112221100163. The reversal of 21112221100122 is 22100112221112.

21112221100122 is a `hidden beast` number, since 211 + 1 + 222 + 110 + 0 + 122 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15074885604321 + 6037335495801 = 3882639^2 + 2457099^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21112221100095 and 21112221100104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2976902983 + ... + 2976910074.

Almost surely, 2^{21112221100122} is an apocalyptic number.

21112221100122 is an abundant number, since it is smaller than the sum of its proper divisors (24863123333754).

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

21112221100122 is a wasteful number, since it uses less digits than its factorization.

21112221100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5953813262 (or 5953813259 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21112221100122 its reverse (22100112221112), we get a palindrome (43212333321234).

The spelling of 21112221100122 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, one hundred thousand, one hundred twenty-two".