111121057 has 2 divisors, whose sum is σ = 111121058. Its totient is φ = 111121056.

The previous prime is 111121037. The next prime is 111121067. The reversal of 111121057 is 750121111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104775696 + 6345361 = 10236^2 + 2519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111121057 is a prime.

It is not a weakly prime, because it can be changed into another prime (111121007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560528 + 55560529.

It is an arithmetic number, because the mean of its divisors is an integer number (55560529).

Almost surely, 2^111121057 is an apocalyptic number.

It is an amenable number.

111121057 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121057 is an equidigital number, since it uses as much as digits as its factorization.

111121057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70, while the sum is 19.

The square root of 111121057 is about 10541.3972982712. The cubic root of 111121057 is about 480.7642007951.

Adding to 111121057 its reverse (750121111), we get a palindrome (861242168).

The spelling of 111121057 in words is "one hundred eleven million, one hundred twenty-one thousand, fifty-seven".