1001111431 has 4 divisors (see below), whose sum is σ = 1015211664. Its totient is φ = 987011200.

The previous prime is 1001111413. The next prime is 1001111459. The reversal of 1001111431 is 1341111001.

It is a happy number.

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 1001111431 - 2⁹ = 1001110919 is a prime.

It is a super-2 number, since 2×1001111431² = 2004448194557735522, which 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 (1001111401) 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, 7050010 + ... + 7050151.

It is an arithmetic number, because the mean of its divisors is an integer number (253802916).

Almost surely, 2^1001111431 is an apocalyptic number.

1001111431 is a deficient number, since it is larger than the sum of its proper divisors (14100233).

1001111431 is an equidigital number, since it uses as much as digits as its factorization.

1001111431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14100232.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1001111431 is about 31640.3449886375. The cubic root of 1001111431 is about 1000.3703398315.

Adding to 1001111431 its reverse (1341111001), we get a palindrome (2342222432).

The spelling of 1001111431 in words is "one billion, one million, one hundred eleven thousand, four hundred thirty-one".