200021010120121 has 8 divisors (see below), whose sum is σ = 201631653817344. Its totient is φ = 198410923846800.

The previous prime is 200021010120109. The next prime is 200021010120157. The reversal of 200021010120121 is 121021010120002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200021010120121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200021010126121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138635410 + ... + 140070763.

It is an arithmetic number, because the mean of its divisors is an integer number (25203956727168).

Almost surely, 2^{200021010120121} is an apocalyptic number.

It is an amenable number.

200021010120121 is a deficient number, since it is larger than the sum of its proper divisors (1610643697223).

200021010120121 is a wasteful number, since it uses less digits than its factorization.

200021010120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278711951.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 200021010120121 its reverse (121021010120002), we get a palindrome (321042020240123).

The spelling of 200021010120121 in words is "two hundred trillion, twenty-one billion, ten million, one hundred twenty thousand, one hundred twenty-one".