11312202991 has 2 divisors, whose sum is σ = 11312202992. Its totient is φ = 11312202990.

The previous prime is 11312202977. The next prime is 11312203051. The reversal of 11312202991 is 19920221311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11312202991 - 2⁹ = 11312202479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11312202091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656101495 + 5656101496.

It is an arithmetic number, because the mean of its divisors is an integer number (5656101496).

Almost surely, 2^11312202991 is an apocalyptic number.

11312202991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312202991 is an equidigital number, since it uses as much as digits as its factorization.

11312202991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 11312202991 in words is "eleven billion, three hundred twelve million, two hundred two thousand, nine hundred ninety-one".