20122001220091 has 2 divisors, whose sum is σ = 20122001220092. Its totient is φ = 20122001220090.

The previous prime is 20122001220031. The next prime is 20122001220151. The reversal of 20122001220091 is 19002210022102.

It is a balanced prime because it is at equal distance from previous prime (20122001220031) and next prime (20122001220151).

It is a cyclic number.

It is not a de Polignac number, because 20122001220091 - 2⁷ = 20122001219963 is a prime.

It is not a weakly prime, because it can be changed into another prime (20122001220011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061000610045 + 10061000610046.

It is an arithmetic number, because the mean of its divisors is an integer number (10061000610046).

Almost surely, 2^{20122001220091} is an apocalyptic number.

20122001220091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122001220091 is an equidigital number, since it uses as much as digits as its factorization.

20122001220091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 20122001220091 its reverse (19002210022102), we get a palindrome (39124211242193).

The spelling of 20122001220091 in words is "twenty trillion, one hundred twenty-two billion, one million, two hundred twenty thousand, ninety-one".