2111011971149 has 2 divisors, whose sum is σ = 2111011971150. Its totient is φ = 2111011971148.

The previous prime is 2111011971143. The next prime is 2111011971151. The reversal of 2111011971149 is 9411791101112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1824439115524 + 286572855625 = 1350718^2 + 535325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111011971149 is a prime.

Together with 2111011971151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111011971143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055505985574 + 1055505985575.

It is an arithmetic number, because the mean of its divisors is an integer number (1055505985575).

Almost surely, 2^{2111011971149} is an apocalyptic number.

It is an amenable number.

2111011971149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111011971149 is an equidigital number, since it uses as much as digits as its factorization.

2111011971149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 38.

The spelling of 2111011971149 in words is "two trillion, one hundred eleven billion, eleven million, nine hundred seventy-one thousand, one hundred forty-nine".