1101221220091 has 2 divisors, whose sum is σ = 1101221220092. Its totient is φ = 1101221220090.

The previous prime is 1101221220041. The next prime is 1101221220149. The reversal of 1101221220091 is 1900221221011.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101221220091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101221220041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550610610045 + 550610610046.

It is an arithmetic number, because the mean of its divisors is an integer number (550610610046).

Almost surely, 2^{1101221220091} is an apocalyptic number.

1101221220091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101221220091 is an equidigital number, since it uses as much as digits as its factorization.

1101221220091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 1101221220091 in words is "one trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty thousand, ninety-one".