11321203032991 has 2 divisors, whose sum is σ = 11321203032992. Its totient is φ = 11321203032990.

The previous prime is 11321203032983. The next prime is 11321203033001. The reversal of 11321203032991 is 19923030212311.

11321203032991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (19923030212311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11321203032991 - 2³ = 11321203032983 is a prime.

It is a super-2 number, since 2×11321203032991² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11321203032991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11321203032091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660601516495 + 5660601516496.

It is an arithmetic number, because the mean of its divisors is an integer number (5660601516496).

Almost surely, 2^{11321203032991} is an apocalyptic number.

11321203032991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321203032991 is an equidigital number, since it uses as much as digits as its factorization.

11321203032991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 37.

The spelling of 11321203032991 in words is "eleven trillion, three hundred twenty-one billion, two hundred three million, thirty-two thousand, nine hundred ninety-one".