11312021200091 has 2 divisors, whose sum is σ = 11312021200092. Its totient is φ = 11312021200090.

The previous prime is 11312021200087. The next prime is 11312021200121. The reversal of 11312021200091 is 19000212021311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11312021200091 - 2² = 11312021200087 is a prime.

It is not a weakly prime, because it can be changed into another prime (11312021200591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656010600045 + 5656010600046.

It is an arithmetic number, because the mean of its divisors is an integer number (5656010600046).

Almost surely, 2^{11312021200091} is an apocalyptic number.

11312021200091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312021200091 is an equidigital number, since it uses as much as digits as its factorization.

11312021200091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 11312021200091 in words is "eleven trillion, three hundred twelve billion, twenty-one million, two hundred thousand, ninety-one".