12111081091 has 2 divisors, whose sum is σ = 12111081092. Its totient is φ = 12111081090.

The previous prime is 12111081083. The next prime is 12111081127. The reversal of 12111081091 is 19018011121.

It is a weak prime.

It is an emirp because it is prime and its reverse (19018011121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12111081091 - 2³ = 12111081083 is a prime.

It is not a weakly prime, because it can be changed into another prime (12111081391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055540545 + 6055540546.

It is an arithmetic number, because the mean of its divisors is an integer number (6055540546).

Almost surely, 2^12111081091 is an apocalyptic number.

12111081091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111081091 is an equidigital number, since it uses as much as digits as its factorization.

12111081091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 25.

The spelling of 12111081091 in words is "twelve billion, one hundred eleven million, eighty-one thousand, ninety-one".