231213011201 has 4 divisors (see below), whose sum is σ = 231243533892. Its totient is φ = 231182488512.

The previous prime is 231213011189. The next prime is 231213011203. The reversal of 231213011201 is 102110312132.

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 10147540225 + 221065470976 = 100735^2 + 470176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231213011201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 231213011201.

It is not an unprimeable number, because it can be changed into a prime (231213011203) 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, 15249980 + ... + 15265133.

It is an arithmetic number, because the mean of its divisors is an integer number (57810883473).

Almost surely, 2^231213011201 is an apocalyptic number.

It is an amenable number.

231213011201 is a deficient number, since it is larger than the sum of its proper divisors (30522691).

231213011201 is an equidigital number, since it uses as much as digits as its factorization.

231213011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30522690.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 231213011201 its reverse (102110312132), we get a palindrome (333323323333).

The spelling of 231213011201 in words is "two hundred thirty-one billion, two hundred thirteen million, eleven thousand, two hundred one".