200020012091 has 2 divisors, whose sum is σ = 200020012092. Its totient is φ = 200020012090.

The previous prime is 200020012061. The next prime is 200020012117. The reversal of 200020012091 is 190210020002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 200020012091 - 2²² = 200015817787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (200020012021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010006045 + 100010006046.

It is an arithmetic number, because the mean of its divisors is an integer number (100010006046).

Almost surely, 2^200020012091 is an apocalyptic number.

200020012091 is a deficient number, since it is larger than the sum of its proper divisors (1).

200020012091 is an equidigital number, since it uses as much as digits as its factorization.

200020012091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 200020012091 its reverse (190210020002), we get a palindrome (390230032093).

The spelling of 200020012091 in words is "two hundred billion, twenty million, twelve thousand, ninety-one".