1231424111 has 4 divisors (see below), whose sum is σ = 1257624672. Its totient is φ = 1205223552.

The previous prime is 1231424107. The next prime is 1231424147. The reversal of 1231424111 is 1114241321.

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 1231424111 - 2² = 1231424107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231424171) 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, 13100210 + ... + 13100303.

It is an arithmetic number, because the mean of its divisors is an integer number (314406168).

Almost surely, 2^1231424111 is an apocalyptic number.

1231424111 is a deficient number, since it is larger than the sum of its proper divisors (26200561).

1231424111 is an equidigital number, since it uses as much as digits as its factorization.

1231424111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26200560.

The product of its digits is 192, while the sum is 20.

The square root of 1231424111 is about 35091.6530103670. The cubic root of 1231424111 is about 1071.8546200411.

Adding to 1231424111 its reverse (1114241321), we get a palindrome (2345665432).

The spelling of 1231424111 in words is "one billion, two hundred thirty-one million, four hundred twenty-four thousand, one hundred eleven".