231331211301 has 4 divisors (see below), whose sum is σ = 308441615072. Its totient is φ = 154220807532.

The previous prime is 231331211297. The next prime is 231331211317. The reversal of 231331211301 is 103112133132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 231331211301 - 2² = 231331211297 is a prime.

It is a super-2 number, since 2×231331211301² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231331216301) 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, 38555201881 + ... + 38555201886.

It is an arithmetic number, because the mean of its divisors is an integer number (77110403768).

Almost surely, 2^231331211301 is an apocalyptic number.

It is an amenable number.

231331211301 is a deficient number, since it is larger than the sum of its proper divisors (77110403771).

231331211301 is an equidigital number, since it uses as much as digits as its factorization.

231331211301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77110403770.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 231331211301 its reverse (103112133132), we get a palindrome (334443344433).

The spelling of 231331211301 in words is "two hundred thirty-one billion, three hundred thirty-one million, two hundred eleven thousand, three hundred one".