200021111312121 has 96 divisors (see below), whose sum is σ = 317001189593088. Its totient is φ = 120528423313920.

The previous prime is 200021111312117. The next prime is 200021111312147. The reversal of 200021111312121 is 121213111120002.

It is a happy number.

200021111312121 is a `hidden beast` number, since 20 + 0 + 0 + 211 + 1 + 1 + 312 + 121 = 666.

It is not a de Polignac number, because 200021111312121 - 2² = 200021111312117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200021111312094 and 200021111312103.

It is not an unprimeable number, because it can be changed into a prime (200021111312161) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 48116695375 + ... + 48116699531.

It is an arithmetic number, because the mean of its divisors is an integer number (3302095724928).

Almost surely, 2^{200021111312121} is an apocalyptic number.

It is an amenable number.

200021111312121 is a deficient number, since it is larger than the sum of its proper divisors (116980078280967).

200021111312121 is a wasteful number, since it uses less digits than its factorization.

200021111312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7791 (or 7788 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 200021111312121 its reverse (121213111120002), we get a palindrome (321234222432123).

The spelling of 200021111312121 in words is "two hundred trillion, twenty-one billion, one hundred eleven million, three hundred twelve thousand, one hundred twenty-one".