1321231213231 has 8 divisors (see below), whose sum is σ = 1323512993520. Its totient is φ = 1318951397568.

The previous prime is 1321231213207. The next prime is 1321231213277. The reversal of 1321231213231 is 1323121321231.

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 1321231213231 - 2²¹ = 1321229116079 is a prime.

It is a super-2 number, since 2×1321231213231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321231213196 and 1321231213205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321231273231) 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, 858220 + ... + 1838206.

It is an arithmetic number, because the mean of its divisors is an integer number (165439124190).

Almost surely, 2^{1321231213231} is an apocalyptic number.

1321231213231 is a deficient number, since it is larger than the sum of its proper divisors (2281780289).

1321231213231 is a wasteful number, since it uses less digits than its factorization.

1321231213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982313.

The product of its digits is 1296, while the sum is 25.

Adding to 1321231213231 its reverse (1323121321231), we get a palindrome (2644352534462).

The spelling of 1321231213231 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-one million, two hundred thirteen thousand, two hundred thirty-one".