1100121220091 has 2 divisors, whose sum is σ = 1100121220092. Its totient is φ = 1100121220090.

The previous prime is 1100121220067. The next prime is 1100121220117. The reversal of 1100121220091 is 1900221210011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1100121220091 - 2²⁶ = 1100054111227 is a prime.

It is not a weakly prime, because it can be changed into another prime (1100121220001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550060610045 + 550060610046.

It is an arithmetic number, because the mean of its divisors is an integer number (550060610046).

Almost surely, 2^{1100121220091} is an apocalyptic number.

1100121220091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100121220091 is an equidigital number, since it uses as much as digits as its factorization.

1100121220091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1100121220091 in words is "one trillion, one hundred billion, one hundred twenty-one million, two hundred twenty thousand, ninety-one".