110121220991 has 2 divisors, whose sum is σ = 110121220992. Its totient is φ = 110121220990.

The previous prime is 110121220969. The next prime is 110121221027. The reversal of 110121220991 is 199022121011.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110121220991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110121226991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55060610495 + 55060610496.

It is an arithmetic number, because the mean of its divisors is an integer number (55060610496).

Almost surely, 2^110121220991 is an apocalyptic number.

110121220991 is a deficient number, since it is larger than the sum of its proper divisors (1).

110121220991 is an equidigital number, since it uses as much as digits as its factorization.

110121220991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 110121220991 in words is "one hundred ten billion, one hundred twenty-one million, two hundred twenty thousand, nine hundred ninety-one".