1231424211 has 4 divisors (see below), whose sum is σ = 1641898952. Its totient is φ = 820949472.

The previous prime is 1231424197. The next prime is 1231424221. The reversal of 1231424211 is 1124241321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1231424211 - 2⁵ = 1231424179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231424221) 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, 205237366 + ... + 205237371.

It is an arithmetic number, because the mean of its divisors is an integer number (410474738).

Almost surely, 2^1231424211 is an apocalyptic number.

1231424211 is a deficient number, since it is larger than the sum of its proper divisors (410474741).

1231424211 is an equidigital number, since it uses as much as digits as its factorization.

1231424211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410474740.

The product of its digits is 384, while the sum is 21.

The square root of 1231424211 is about 35091.6544352072. The cubic root of 1231424211 is about 1071.8546490550.

Adding to 1231424211 its reverse (1124241321), we get a palindrome (2355665532).

The spelling of 1231424211 in words is "one billion, two hundred thirty-one million, four hundred twenty-four thousand, two hundred eleven".