231120212443 has 4 divisors (see below), whose sum is σ = 231368997240. Its totient is φ = 230871427648.

The previous prime is 231120212437. The next prime is 231120212503. The reversal of 231120212443 is 344212021132.

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 231120212443 - 2¹³ = 231120204251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231120282443) 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, 124391005 + ... + 124392862.

It is an arithmetic number, because the mean of its divisors is an integer number (57842249310).

Almost surely, 2^231120212443 is an apocalyptic number.

231120212443 is a deficient number, since it is larger than the sum of its proper divisors (248784797).

231120212443 is an equidigital number, since it uses as much as digits as its factorization.

231120212443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248784796.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 231120212443 its reverse (344212021132), we get a palindrome (575332233575).

The spelling of 231120212443 in words is "two hundred thirty-one billion, one hundred twenty million, two hundred twelve thousand, four hundred forty-three".