2116611011511 has 12 divisors (see below), whose sum is σ = 3079322176840. Its totient is φ = 1400922395280.

The previous prime is 2116611011461. The next prime is 2116611011521. The reversal of 2116611011511 is 1151101166112.

It is a happy number.

2116611011511 is a `hidden beast` number, since 21 + 1 + 6 + 6 + 110 + 11 + 511 = 666.

It is not a de Polignac number, because 2116611011511 - 2¹⁰ = 2116611010487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116611011521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 845966380 + ... + 845968881.

Almost surely, 2^{2116611011511} is an apocalyptic number.

2116611011511 is a deficient number, since it is larger than the sum of its proper divisors (962711165329).

2116611011511 is a wasteful number, since it uses less digits than its factorization.

2116611011511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691935406 (or 1691935403 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 27.

Adding to 2116611011511 its reverse (1151101166112), we get a palindrome (3267712177623).

The spelling of 2116611011511 in words is "two trillion, one hundred sixteen billion, six hundred eleven million, eleven thousand, five hundred eleven".