111231138973 has 2 divisors, whose sum is σ = 111231138974. Its totient is φ = 111231138972.

The previous prime is 111231138961. The next prime is 111231139021. The reversal of 111231138973 is 379831132111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86199785604 + 25031353369 = 293598^2 + 158213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111231138973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111231138913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55615569486 + 55615569487.

It is an arithmetic number, because the mean of its divisors is an integer number (55615569487).

Almost surely, 2^111231138973 is an apocalyptic number.

It is an amenable number.

111231138973 is a deficient number, since it is larger than the sum of its proper divisors (1).

111231138973 is an equidigital number, since it uses as much as digits as its factorization.

111231138973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

It can be divided in two parts, 111231138 and 973, that added together give a palindrome (111232111).

The spelling of 111231138973 in words is "one hundred eleven billion, two hundred thirty-one million, one hundred thirty-eight thousand, nine hundred seventy-three".