231421124213 has 4 divisors (see below), whose sum is σ = 232281426060. Its totient is φ = 230560822368.

The previous prime is 231421124203. The next prime is 231421124257. The reversal of 231421124213 is 312421124132.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 135183434929 + 96237689284 = 367673^2 + 310222^2 .

It is a cyclic number.

It is not a de Polignac number, because 231421124213 - 2¹⁰ = 231421123189 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 (231421124203) 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, 430150520 + ... + 430151057.

It is an arithmetic number, because the mean of its divisors is an integer number (58070356515).

Almost surely, 2^231421124213 is an apocalyptic number.

It is an amenable number.

231421124213 is a deficient number, since it is larger than the sum of its proper divisors (860301847).

231421124213 is an equidigital number, since it uses as much as digits as its factorization.

231421124213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860301846.

The product of its digits is 2304, while the sum is 26.

Adding to 231421124213 its reverse (312421124132), we get a palindrome (543842248345).

The spelling of 231421124213 in words is "two hundred thirty-one billion, four hundred twenty-one million, one hundred twenty-four thousand, two hundred thirteen".