111540123293 has 2 divisors, whose sum is σ = 111540123294. Its totient is φ = 111540123292.

The previous prime is 111540123193. The next prime is 111540123329. The reversal of 111540123293 is 392321045111.

Together with next prime (111540123329) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104382624889 + 7157498404 = 323083^2 + 84602^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111540123293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111540123193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55770061646 + 55770061647.

It is an arithmetic number, because the mean of its divisors is an integer number (55770061647).

Almost surely, 2^111540123293 is an apocalyptic number.

It is an amenable number.

111540123293 is a deficient number, since it is larger than the sum of its proper divisors (1).

111540123293 is an equidigital number, since it uses as much as digits as its factorization.

111540123293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 111540123293 in words is "one hundred eleven billion, five hundred forty million, one hundred twenty-three thousand, two hundred ninety-three".