1101201219991 has 2 divisors, whose sum is σ = 1101201219992. Its totient is φ = 1101201219990.

The previous prime is 1101201219947. The next prime is 1101201220013. The reversal of 1101201219991 is 1999121021011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1101201219991 - 2¹⁷ = 1101201088919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1101201219991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101201219191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550600609995 + 550600609996.

It is an arithmetic number, because the mean of its divisors is an integer number (550600609996).

Almost surely, 2^{1101201219991} is an apocalyptic number.

1101201219991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101201219991 is an equidigital number, since it uses as much as digits as its factorization.

1101201219991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 37.

The spelling of 1101201219991 in words is "one trillion, one hundred one billion, two hundred one million, two hundred nineteen thousand, nine hundred ninety-one".