2112111523 has 2 divisors, whose sum is σ = 2112111524. Its totient is φ = 2112111522.

The previous prime is 2112111509. The next prime is 2112111527. The reversal of 2112111523 is 3251112112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2112111523 - 2⁹ = 2112111011 is a prime.

It is a super-2 number, since 2×2112111523² = 8922030171178759058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2112111523.

It is not a weakly prime, because it can be changed into another prime (2112111527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056055761 + 1056055762.

It is an arithmetic number, because the mean of its divisors is an integer number (1056055762).

Almost surely, 2^2112111523 is an apocalyptic number.

2112111523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112111523 is an equidigital number, since it uses as much as digits as its factorization.

2112111523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 19.

The square root of 2112111523 is about 45957.7145101886. The cubic root of 2112111523 is about 1283.0363145460.

Adding to 2112111523 its reverse (3251112112), we get a palindrome (5363223635).

The spelling of 2112111523 in words is "two billion, one hundred twelve million, one hundred eleven thousand, five hundred twenty-three".