11420431111 has 4 divisors (see below), whose sum is σ = 11613997800. Its totient is φ = 11226864424.

The previous prime is 11420431079. The next prime is 11420431117. The reversal of 11420431111 is 11113402411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11113402411 = 9539 ⋅1165049.

It is a cyclic number.

It is not a de Polignac number, because 11420431111 - 2⁵ = 11420431079 is a prime.

It is a super-2 number, since 2×11420431111² (a number of 21 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 (11420431117) 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, 96783256 + ... + 96783373.

It is an arithmetic number, because the mean of its divisors is an integer number (2903499450).

Almost surely, 2^11420431111 is an apocalyptic number.

11420431111 is a deficient number, since it is larger than the sum of its proper divisors (193566689).

11420431111 is an equidigital number, since it uses as much as digits as its factorization.

11420431111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193566688.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 11420431111 its reverse (11113402411), we get a palindrome (22533833522).

The spelling of 11420431111 in words is "eleven billion, four hundred twenty million, four hundred thirty-one thousand, one hundred eleven".