1231201112321 has 8 divisors (see below), whose sum is σ = 1240218440424. Its totient is φ = 1222184225920.

The previous prime is 1231201112293. The next prime is 1231201112333. The reversal of 1231201112321 is 1232111021321.

It can be written as a sum of positive squares in 4 ways, for example, as 551211214096 + 679989898225 = 742436^2 + 824615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231201112321 - 2²⁶ = 1231134003457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231201112293 and 1231201112302.

It is not an unprimeable number, because it can be changed into a prime (1231201112371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7295531 + ... + 7462383.

It is an arithmetic number, because the mean of its divisors is an integer number (155027305053).

Almost surely, 2^{1231201112321} is an apocalyptic number.

It is an amenable number.

1231201112321 is a deficient number, since it is larger than the sum of its proper divisors (9017328103).

1231201112321 is a wasteful number, since it uses less digits than its factorization.

1231201112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220851.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1231201112321 its reverse (1232111021321), we get a palindrome (2463312133642).

The spelling of 1231201112321 in words is "one trillion, two hundred thirty-one billion, two hundred one million, one hundred twelve thousand, three hundred twenty-one".