2111016111649 has 2 divisors, whose sum is σ = 2111016111650. Its totient is φ = 2111016111648.

The previous prime is 2111016111647. The next prime is 2111016111703. The reversal of 2111016111649 is 9461116101112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2024909078049 + 86107033600 = 1422993^2 + 293440^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111016111649 - 2¹ = 2111016111647 is a prime.

Together with 2111016111647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2111016111647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055508055824 + 1055508055825.

It is an arithmetic number, because the mean of its divisors is an integer number (1055508055825).

Almost surely, 2^{2111016111649} is an apocalyptic number.

It is an amenable number.

2111016111649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111016111649 is an equidigital number, since it uses as much as digits as its factorization.

2111016111649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 2111016111649 in words is "two trillion, one hundred eleven billion, sixteen million, one hundred eleven thousand, six hundred forty-nine".