111331201123 has 2 divisors, whose sum is σ = 111331201124. Its totient is φ = 111331201122.

The previous prime is 111331201117. The next prime is 111331201181. The reversal of 111331201123 is 321102133111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111331201123 - 2⁹ = 111331200611 is a prime.

It is a super-2 number, since 2×111331201123² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111331201123.

It is not a weakly prime, because it can be changed into another prime (111331201523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55665600561 + 55665600562.

It is an arithmetic number, because the mean of its divisors is an integer number (55665600562).

Almost surely, 2^111331201123 is an apocalyptic number.

111331201123 is a deficient number, since it is larger than the sum of its proper divisors (1).

111331201123 is an equidigital number, since it uses as much as digits as its factorization.

111331201123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 111331201123 its reverse (321102133111), we get a palindrome (432433334234).

The spelling of 111331201123 in words is "one hundred eleven billion, three hundred thirty-one million, two hundred one thousand, one hundred twenty-three".