200210121091 has 4 divisors (see below), whose sum is σ = 207113918400. Its totient is φ = 193306323784.

The previous prime is 200210121053. The next prime is 200210121103. The reversal of 200210121091 is 190121012002.

It is a happy number.

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 200210121091 - 2¹⁹ = 200209596803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200210121011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3451898611 + ... + 3451898668.

It is an arithmetic number, because the mean of its divisors is an integer number (51778479600).

Almost surely, 2^200210121091 is an apocalyptic number.

200210121091 is a deficient number, since it is larger than the sum of its proper divisors (6903797309).

200210121091 is an equidigital number, since it uses as much as digits as its factorization.

200210121091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6903797308.

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

Adding to 200210121091 its reverse (190121012002), we get a palindrome (390331133093).

The spelling of 200210121091 in words is "two hundred billion, two hundred ten million, one hundred twenty-one thousand, ninety-one".