2112111555 has 16 divisors (see below), whose sum is σ = 3425673120. Its totient is φ = 1111027968.

The previous prime is 2112111527. The next prime is 2112111563. The reversal of 2112111555 is 5551112112.

It is not a de Polignac number, because 2112111555 - 2⁵ = 2112111523 is a prime.

It is a super-2 number, since 2×2112111555² = 8922030441529036050, which contains 22 as substring.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 963340 + ... + 965529.

It is an arithmetic number, because the mean of its divisors is an integer number (214104570).

Almost surely, 2^2112111555 is an apocalyptic number.

2112111555 is a deficient number, since it is larger than the sum of its proper divisors (1313561565).

2112111555 is a wasteful number, since it uses less digits than its factorization.

2112111555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928950.

The product of its digits is 500, while the sum is 24.

The square root of 2112111555 is about 45957.7148583347. The cubic root of 2112111555 is about 1283.0363210256.

Adding to 2112111555 its reverse (5551112112), we get a palindrome (7663223667).

The spelling of 2112111555 in words is "two billion, one hundred twelve million, one hundred eleven thousand, five hundred fifty-five".