20112322091 has 2 divisors, whose sum is σ = 20112322092. Its totient is φ = 20112322090.

The previous prime is 20112322079. The next prime is 20112322099. The reversal of 20112322091 is 19022321102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20112322091 - 2¹⁰ = 20112321067 is a prime.

It is a super-2 number, since 2×20112322091² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20112322099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056161045 + 10056161046.

It is an arithmetic number, because the mean of its divisors is an integer number (10056161046).

Almost surely, 2^20112322091 is an apocalyptic number.

20112322091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112322091 is an equidigital number, since it uses as much as digits as its factorization.

20112322091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 20112322091 its reverse (19022321102), we get a palindrome (39134643193).

The spelling of 20112322091 in words is "twenty billion, one hundred twelve million, three hundred twenty-two thousand, ninety-one".