20100022091 has 2 divisors, whose sum is σ = 20100022092. Its totient is φ = 20100022090.

The previous prime is 20100022087. The next prime is 20100022123. The reversal of 20100022091 is 19022000102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20100022091 - 2² = 20100022087 is a prime.

It is not a weakly prime, because it can be changed into another prime (20100022051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050011045 + 10050011046.

It is an arithmetic number, because the mean of its divisors is an integer number (10050011046).

Almost surely, 2^20100022091 is an apocalyptic number.

20100022091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100022091 is an equidigital number, since it uses as much as digits as its factorization.

20100022091 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20100022091 its reverse (19022000102), we get a palindrome (39122022193).

The spelling of 20100022091 in words is "twenty billion, one hundred million, twenty-two thousand, ninety-one".