11312202091 has 2 divisors, whose sum is σ = 11312202092. Its totient is φ = 11312202090.

The previous prime is 11312202071. The next prime is 11312202133. The reversal of 11312202091 is 19020221311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11312202091 - 2⁷ = 11312201963 is a prime.

It is a super-2 number, since 2×11312202091² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11312202071) 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, 5656101045 + 5656101046.

It is an arithmetic number, because the mean of its divisors is an integer number (5656101046).

Almost surely, 2^11312202091 is an apocalyptic number.

11312202091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312202091 is an equidigital number, since it uses as much as digits as its factorization.

11312202091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

It can be divided in two parts, 1131220 and 2091, that added together give a palindrome (1133311).

The spelling of 11312202091 in words is "eleven billion, three hundred twelve million, two hundred two thousand, ninety-one".