21102020221122 has 20 divisors (see below), whose sum is σ = 47284156421766. Its totient is φ = 7034006740320.

The previous prime is 21102020221067. The next prime is 21102020221133. The reversal of 21102020221122 is 22112202020112.

It is a happy number.

21102020221122 is a `hidden beast` number, since 211 + 0 + 20 + 202 + 211 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18279549660681 + 2822470560441 = 4275459^2 + 1680021^2 .

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 = 21102020221095 and 21102020221104.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 65129691879 + ... + 65129692202.

Almost surely, 2^{21102020221122} is an apocalyptic number.

21102020221122 is an abundant number, since it is smaller than the sum of its proper divisors (26182136200644).

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

21102020221122 is a wasteful number, since it uses less digits than its factorization.

21102020221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130259384095 (or 130259384086 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21102020221122 its reverse (22112202020112), we get a palindrome (43214222241234).

The spelling of 21102020221122 in words is "twenty-one trillion, one hundred two billion, twenty million, two hundred twenty-one thousand, one hundred twenty-two".