11131330431 has 16 divisors (see below), whose sum is σ = 16923652704. Its totient is φ = 6447105024.

The previous prime is 11131330423. The next prime is 11131330471. The reversal of 11131330431 is 13403313111.

It is not a de Polignac number, because 11131330431 - 2³ = 11131330423 is a prime.

It is a super-2 number, since 2×11131330431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11131330398 and 11131330407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131330411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8394006 + ... + 8395331.

It is an arithmetic number, because the mean of its divisors is an integer number (1057728294).

Almost surely, 2^11131330431 is an apocalyptic number.

11131330431 is a deficient number, since it is larger than the sum of its proper divisors (5792322273).

11131330431 is a wasteful number, since it uses less digits than its factorization.

11131330431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16789370.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 11131330431 its reverse (13403313111), we get a palindrome (24534643542).

The spelling of 11131330431 in words is "eleven billion, one hundred thirty-one million, three hundred thirty thousand, four hundred thirty-one".