111123000257 has 2 divisors, whose sum is σ = 111123000258. Its totient is φ = 111123000256.

The previous prime is 111123000143. The next prime is 111123000301. The reversal of 111123000257 is 752000321111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91855061776 + 19267938481 = 303076^2 + 138809^2 .

It is a cyclic number.

It is not a de Polignac number, because 111123000257 - 2²² = 111118805953 is a prime.

It is a super-2 number, since 2×111123000257² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111123008257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561500128 + 55561500129.

It is an arithmetic number, because the mean of its divisors is an integer number (55561500129).

Almost surely, 2^111123000257 is an apocalyptic number.

It is an amenable number.

111123000257 is a deficient number, since it is larger than the sum of its proper divisors (1).

111123000257 is an equidigital number, since it uses as much as digits as its factorization.

111123000257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 23.

Adding to 111123000257 its reverse (752000321111), we get a palindrome (863123321368).

The spelling of 111123000257 in words is "one hundred eleven billion, one hundred twenty-three million, two hundred fifty-seven", and thus it is an aban number.