11421232431 has 8 divisors (see below), whose sum is σ = 17403782784. Its totient is φ = 6526418520.

The previous prime is 11421232423. The next prime is 11421232469. The reversal of 11421232431 is 13423212411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11421232431 - 2³ = 11421232423 is a prime.

It is a super-2 number, since 2×11421232431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421232531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271934085 + ... + 271934126.

It is an arithmetic number, because the mean of its divisors is an integer number (2175472848).

Almost surely, 2^11421232431 is an apocalyptic number.

11421232431 is a deficient number, since it is larger than the sum of its proper divisors (5982550353).

11421232431 is an equidigital number, since it uses as much as digits as its factorization.

11421232431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543868221.

The product of its digits is 1152, while the sum is 24.

Adding to 11421232431 its reverse (13423212411), we get a palindrome (24844444842).

The spelling of 11421232431 in words is "eleven billion, four hundred twenty-one million, two hundred thirty-two thousand, four hundred thirty-one".