200122210091 has 2 divisors, whose sum is σ = 200122210092. Its totient is φ = 200122210090.

The previous prime is 200122210073. The next prime is 200122210207. The reversal of 200122210091 is 190012221002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200122210091 - 2¹⁴ = 200122193707 is a prime.

It is not a weakly prime, because it can be changed into another prime (200122210031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100061105045 + 100061105046.

It is an arithmetic number, because the mean of its divisors is an integer number (100061105046).

Almost surely, 2^200122210091 is an apocalyptic number.

200122210091 is a deficient number, since it is larger than the sum of its proper divisors (1).

200122210091 is an equidigital number, since it uses as much as digits as its factorization.

200122210091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 200122210091 its reverse (190012221002), we get a palindrome (390134431093).

The spelling of 200122210091 in words is "two hundred billion, one hundred twenty-two million, two hundred ten thousand, ninety-one".