111231323123 has 2 divisors, whose sum is σ = 111231323124. Its totient is φ = 111231323122.

The previous prime is 111231323081. The next prime is 111231323131. The reversal of 111231323123 is 321323132111.

It is a strong prime.

It is an emirp because it is prime and its reverse (321323132111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111231323123 - 2²² = 111227128819 is a prime.

It is not a weakly prime, because it can be changed into another prime (111231323023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55615661561 + 55615661562.

It is an arithmetic number, because the mean of its divisors is an integer number (55615661562).

Almost surely, 2^111231323123 is an apocalyptic number.

111231323123 is a deficient number, since it is larger than the sum of its proper divisors (1).

111231323123 is an equidigital number, since it uses as much as digits as its factorization.

111231323123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

Adding to 111231323123 its reverse (321323132111), we get a palindrome (432554455234).

The spelling of 111231323123 in words is "one hundred eleven billion, two hundred thirty-one million, three hundred twenty-three thousand, one hundred twenty-three".