11312021199911 has 2 divisors, whose sum is σ = 11312021199912. Its totient is φ = 11312021199910.

The previous prime is 11312021199881. The next prime is 11312021199931. The reversal of 11312021199911 is 11999112021311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11312021199911 - 2¹⁰ = 11312021198887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11312021199931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656010599955 + 5656010599956.

It is an arithmetic number, because the mean of its divisors is an integer number (5656010599956).

Almost surely, 2^{11312021199911} is an apocalyptic number.

11312021199911 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312021199911 is an equidigital number, since it uses as much as digits as its factorization.

11312021199911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 41.

The spelling of 11312021199911 in words is "eleven trillion, three hundred twelve billion, twenty-one million, one hundred ninety-nine thousand, nine hundred eleven".