111223123031 has 2 divisors, whose sum is σ = 111223123032. Its totient is φ = 111223123030.

The previous prime is 111223123009. The next prime is 111223123073. The reversal of 111223123031 is 130321322111.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (130321322111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111223123031 - 2¹⁸ = 111222860887 is a prime.

It is a super-2 number, since 2×111223123031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111223122994 and 111223123012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111223123831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611561515 + 55611561516.

It is an arithmetic number, because the mean of its divisors is an integer number (55611561516).

Almost surely, 2^111223123031 is an apocalyptic number.

111223123031 is a deficient number, since it is larger than the sum of its proper divisors (1).

111223123031 is an equidigital number, since it uses as much as digits as its factorization.

111223123031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 111223123031 its reverse (130321322111), we get a palindrome (241544445142).

The spelling of 111223123031 in words is "one hundred eleven billion, two hundred twenty-three million, one hundred twenty-three thousand, thirty-one".