2111561216151 has 16 divisors (see below), whose sum is σ = 2981067266304. Its totient is φ = 1324883525504.

The previous prime is 2111561216129. The next prime is 2111561216159. The reversal of 2111561216151 is 1516121651112.

It is a cyclic number.

It is not a de Polignac number, because 2111561216151 - 2²⁶ = 2111494107287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111561216159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4348360 + ... + 4809506.

It is an arithmetic number, because the mean of its divisors is an integer number (186316704144).

Almost surely, 2^{2111561216151} is an apocalyptic number.

2111561216151 is a deficient number, since it is larger than the sum of its proper divisors (869506050153).

2111561216151 is a wasteful number, since it uses less digits than its factorization.

2111561216151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550950.

The product of its digits is 3600, while the sum is 33.

Adding to 2111561216151 its reverse (1516121651112), we get a palindrome (3627682867263).

The spelling of 2111561216151 in words is "two trillion, one hundred eleven billion, five hundred sixty-one million, two hundred sixteen thousand, one hundred fifty-one".