2156010111 has 12 divisors (see below), whose sum is σ = 3144473488. Its totient is φ = 1423384704.

The previous prime is 2156010083. The next prime is 2156010127. The reversal of 2156010111 is 1110106512.

It is a happy number.

2156010111 is a `hidden beast` number, since 2 + 1 + 560 + 101 + 1 + 1 = 666.

It is not a de Polignac number, because 2156010111 - 2¹⁰ = 2156009087 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 (2156010911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1161970 + ... + 1163823.

Almost surely, 2^2156010111 is an apocalyptic number.

2156010111 is a deficient number, since it is larger than the sum of its proper divisors (988463377).

2156010111 is a wasteful number, since it uses less digits than its factorization.

2156010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325902 (or 2325899 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

The square root of 2156010111 is about 46432.8559427481. The cubic root of 2156010111 is about 1291.8644016634.

Adding to 2156010111 its reverse (1110106512), we get a palindrome (3266116623).

The spelling of 2156010111 in words is "two billion, one hundred fifty-six million, ten thousand, one hundred eleven".