111131020123 has 2 divisors, whose sum is σ = 111131020124. Its totient is φ = 111131020122.

The previous prime is 111131020103. The next prime is 111131020139. The reversal of 111131020123 is 321020131111.

It is a happy number.

It is an a-pointer prime, because the next prime (111131020139) can be obtained adding 111131020123 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111131020123 - 2⁹ = 111131019611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111131020097 and 111131020106.

It is not a weakly prime, because it can be changed into another prime (111131020103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55565510061 + 55565510062.

It is an arithmetic number, because the mean of its divisors is an integer number (55565510062).

Almost surely, 2^111131020123 is an apocalyptic number.

111131020123 is a deficient number, since it is larger than the sum of its proper divisors (1).

111131020123 is an equidigital number, since it uses as much as digits as its factorization.

111131020123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 111131020123 its reverse (321020131111), we get a palindrome (432151151234).

The spelling of 111131020123 in words is "one hundred eleven billion, one hundred thirty-one million, twenty thousand, one hundred twenty-three".