231311121203 has 4 divisors (see below), whose sum is σ = 243485390760. Its totient is φ = 219136851648.

The previous prime is 231311121149. The next prime is 231311121229. The reversal of 231311121203 is 302121113132.

It is a happy number.

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 231311121203 - 2⁸ = 231311120947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231311121803) 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, 6087134750 + ... + 6087134787.

It is an arithmetic number, because the mean of its divisors is an integer number (60871347690).

Almost surely, 2^231311121203 is an apocalyptic number.

231311121203 is a deficient number, since it is larger than the sum of its proper divisors (12174269557).

231311121203 is a wasteful number, since it uses less digits than its factorization.

231311121203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12174269556.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 231311121203 its reverse (302121113132), we get a palindrome (533432234335).

The spelling of 231311121203 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred twenty-one thousand, two hundred three".