200121120091 has 8 divisors (see below), whose sum is σ = 211836311280. Its totient is φ = 188726893152.

The previous prime is 200121120041. The next prime is 200121120137. The reversal of 200121120091 is 190021121002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 200121120091 - 2¹³ = 200121111899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200121120011) 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, 80239780 + ... + 80242273.

It is an arithmetic number, because the mean of its divisors is an integer number (26479538910).

Almost surely, 2^200121120091 is an apocalyptic number.

200121120091 is a deficient number, since it is larger than the sum of its proper divisors (11715191189).

200121120091 is a wasteful number, since it uses less digits than its factorization.

200121120091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160482125.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 200121120091 its reverse (190021121002), we get a palindrome (390142241093).

The spelling of 200121120091 in words is "two hundred billion, one hundred twenty-one million, one hundred twenty thousand, ninety-one".