111401031431 has 4 divisors (see below), whose sum is σ = 111577578864. Its totient is φ = 111224484000.

The previous prime is 111401031403. The next prime is 111401031451. The reversal of 111401031431 is 134130104111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111401031431 is a prime.

It is a super-2 number, since 2×111401031431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111401031451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88272770 + ... + 88274031.

It is an arithmetic number, because the mean of its divisors is an integer number (27894394716).

Almost surely, 2^111401031431 is an apocalyptic number.

111401031431 is a deficient number, since it is larger than the sum of its proper divisors (176547433).

111401031431 is an equidigital number, since it uses as much as digits as its factorization.

111401031431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176547432.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 111401031431 its reverse (134130104111), we get a palindrome (245531135542).

The spelling of 111401031431 in words is "one hundred eleven billion, four hundred one million, thirty-one thousand, four hundred thirty-one".