1111042043431 has 4 divisors (see below), whose sum is σ = 1114338904432. Its totient is φ = 1107745182432.

The previous prime is 1111042043417. The next prime is 1111042043453. The reversal of 1111042043431 is 1343402401111.

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

It is a cyclic number.

It is not a de Polignac number, because 1111042043431 - 2¹³ = 1111042035239 is a prime.

It is a super-2 number, since 2×1111042043431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111042043396 and 1111042043405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111042043131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1648429995 + ... + 1648430668.

It is an arithmetic number, because the mean of its divisors is an integer number (278584726108).

Almost surely, 2^{1111042043431} is an apocalyptic number.

1111042043431 is a deficient number, since it is larger than the sum of its proper divisors (3296861001).

1111042043431 is an equidigital number, since it uses as much as digits as its factorization.

1111042043431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3296861000.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1111042043431 its reverse (1343402401111), we get a palindrome (2454444444542).

The spelling of 1111042043431 in words is "one trillion, one hundred eleven billion, forty-two million, forty-three thousand, four hundred thirty-one".