111123201031 has 2 divisors, whose sum is σ = 111123201032. Its totient is φ = 111123201030.

The previous prime is 111123200953. The next prime is 111123201047. The reversal of 111123201031 is 130102321111.

It is a happy number.

It is an a-pointer prime, because the next prime (111123201047) can be obtained adding 111123201031 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111123201031 - 2²¹ = 111121103879 is a prime.

It is a super-2 number, since 2×111123201031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111123200996 and 111123201014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111123201071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561600515 + 55561600516.

It is an arithmetic number, because the mean of its divisors is an integer number (55561600516).

Almost surely, 2^111123201031 is an apocalyptic number.

111123201031 is a deficient number, since it is larger than the sum of its proper divisors (1).

111123201031 is an equidigital number, since it uses as much as digits as its factorization.

111123201031 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 111123201031 its reverse (130102321111), we get a palindrome (241225522142).

The spelling of 111123201031 in words is "one hundred eleven billion, one hundred twenty-three million, two hundred one thousand, thirty-one".