2111087904493 has 2 divisors, whose sum is σ = 2111087904494. Its totient is φ = 2111087904492.

The previous prime is 2111087904491. The next prime is 2111087904503. The reversal of 2111087904493 is 3944097801112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1086737446089 + 1024350458404 = 1042467^2 + 1012102^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111087904493 - 2¹ = 2111087904491 is a prime.

Together with 2111087904491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111087904491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055543952246 + 1055543952247.

It is an arithmetic number, because the mean of its divisors is an integer number (1055543952247).

Almost surely, 2^{2111087904493} is an apocalyptic number.

It is an amenable number.

2111087904493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111087904493 is an equidigital number, since it uses as much as digits as its factorization.

2111087904493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 2111087904493 in words is "two trillion, one hundred eleven billion, eighty-seven million, nine hundred four thousand, four hundred ninety-three".