200021211010091 has 4 divisors (see below), whose sum is σ = 206918494148400. Its totient is φ = 193123927871784.

The previous prime is 200021211010079. The next prime is 200021211010141. The reversal of 200021211010091 is 190010112120002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 200021211010091 - 2¹⁴ = 200021210993707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200021211010591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3448641569111 + ... + 3448641569168.

It is an arithmetic number, because the mean of its divisors is an integer number (51729623537100).

Almost surely, 2^{200021211010091} is an apocalyptic number.

200021211010091 is a deficient number, since it is larger than the sum of its proper divisors (6897283138309).

200021211010091 is an equidigital number, since it uses as much as digits as its factorization.

200021211010091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6897283138308.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 200021211010091 its reverse (190010112120002), we get a palindrome (390031323130093).

The spelling of 200021211010091 in words is "two hundred trillion, twenty-one billion, two hundred eleven million, ten thousand, ninety-one".