200121021202122 has 48 divisors (see below), whose sum is σ = 445339125951720. Its totient is φ = 64900503110016.

The previous prime is 200121021202097. The next prime is 200121021202147. The reversal of 200121021202122 is 221202120121002.

It is a happy number.

200121021202122 is a `hidden beast` number, since 200 + 1 + 210 + 21 + 20 + 212 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (200121021202097) and next prime (200121021202147).

It can be written as a sum of positive squares in 4 ways, for example, as 197492177282481 + 2628843919641 = 14053191^2 + 1621371^2 .

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 = 200121021202095 and 200121021202104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3628848 + ... + 20332500.

Almost surely, 2^{200121021202122} is an apocalyptic number.

200121021202122 is an abundant number, since it is smaller than the sum of its proper divisors (245218104749598).

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

200121021202122 is a wasteful number, since it uses less digits than its factorization.

200121021202122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16721687 (or 16721684 counting only the distinct ones).

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

Adding to 200121021202122 its reverse (221202120121002), we get a palindrome (421323141323124).

The spelling of 200121021202122 in words is "two hundred trillion, one hundred twenty-one billion, twenty-one million, two hundred two thousand, one hundred twenty-two".