200021100102122 has 12 divisors (see below), whose sum is σ = 324886343065830. Its totient is φ = 92317430816208.

The previous prime is 200021100102053. The next prime is 200021100102137. The reversal of 200021100102122 is 221201001120002.

It can be written as a sum of positive squares in 3 ways, for example, as 88083874860601 + 111937225241521 = 9385301^2 + 10580039^2 .

It is a junction number, because it is equal to n+sod(n) for n = 200021100102097 and 200021100102106.

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, 295889200997 + ... + 295889201672.

Almost surely, 2^{200021100102122} is an apocalyptic number.

200021100102122 is a deficient number, since it is larger than the sum of its proper divisors (124865242963708).

200021100102122 is a wasteful number, since it uses less digits than its factorization.

200021100102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591778402697 (or 591778402684 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 200021100102122 its reverse (221201001120002), we get a palindrome (421222101222124).

The spelling of 200021100102122 in words is "two hundred trillion, twenty-one billion, one hundred million, one hundred two thousand, one hundred twenty-two".