111111111057 has 32 divisors (see below), whose sum is σ = 149595144192. Its totient is φ = 73355675904.

The previous prime is 111111111049. The next prime is 111111111091. The reversal of 111111111057 is 750111111111.

It is not a de Polignac number, because 111111111057 - 2³ = 111111111049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111111111017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128749408 + ... + 128750270.

It is an arithmetic number, because the mean of its divisors is an integer number (4674848256).

Almost surely, 2^111111111057 is an apocalyptic number.

It is an amenable number.

111111111057 is a deficient number, since it is larger than the sum of its proper divisors (38484033135).

111111111057 is a wasteful number, since it uses less digits than its factorization.

111111111057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917.

The product of its (nonzero) digits is 35, while the sum is 21.

Adding to 111111111057 its reverse (750111111111), we get a palindrome (861222222168).

The spelling of 111111111057 in words is "one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, fifty-seven".