111320203031 has 2 divisors, whose sum is σ = 111320203032. Its totient is φ = 111320203030.

The previous prime is 111320203013. The next prime is 111320203109. The reversal of 111320203031 is 130302023111.

Together with previous prime (111320203013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111320203031 - 2¹⁴ = 111320186647 is a prime.

It is a super-2 number, since 2×111320203031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111320209031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55660101515 + 55660101516.

It is an arithmetic number, because the mean of its divisors is an integer number (55660101516).

Almost surely, 2^111320203031 is an apocalyptic number.

111320203031 is a deficient number, since it is larger than the sum of its proper divisors (1).

111320203031 is an equidigital number, since it uses as much as digits as its factorization.

111320203031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 111320203031 its reverse (130302023111), we get a palindrome (241622226142).

The spelling of 111320203031 in words is "one hundred eleven billion, three hundred twenty million, two hundred three thousand, thirty-one".