20001102091 has 2 divisors, whose sum is σ = 20001102092. Its totient is φ = 20001102090.

The previous prime is 20001102067. The next prime is 20001102161. The reversal of 20001102091 is 19020110002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001102091 - 2²⁹ = 19464231179 is a prime.

It is not a weakly prime, because it can be changed into another prime (20001102031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000551045 + 10000551046.

It is an arithmetic number, because the mean of its divisors is an integer number (10000551046).

Almost surely, 2^20001102091 is an apocalyptic number.

20001102091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001102091 is an equidigital number, since it uses as much as digits as its factorization.

20001102091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 20001102091 its reverse (19020110002), we get a palindrome (39021212093).

The spelling of 20001102091 in words is "twenty billion, one million, one hundred two thousand, ninety-one".