31233103231321 has 4 divisors (see below), whose sum is σ = 31233959133412. Its totient is φ = 31232247329232.

The previous prime is 31233103231277. The next prime is 31233103231331. The reversal of 31233103231321 is 12313230133213.

It is a happy number.

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 4461388840000 + 26771714391321 = 2112200^2 + 5174139^2 .

It is a cyclic number.

It is not a de Polignac number, because 31233103231321 - 2²⁷ = 31232969013593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31233103231321.

It is not an unprimeable number, because it can be changed into a prime (31233103231331) 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, 427896306 + ... + 427969291.

It is an arithmetic number, because the mean of its divisors is an integer number (7808489783353).

Almost surely, 2^{31233103231321} is an apocalyptic number.

It is an amenable number.

31233103231321 is a deficient number, since it is larger than the sum of its proper divisors (855902091).

31233103231321 is an equidigital number, since it uses as much as digits as its factorization.

31233103231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855902090.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31233103231321 its reverse (12313230133213), we get a palindrome (43546333364534).

The spelling of 31233103231321 in words is "thirty-one trillion, two hundred thirty-three billion, one hundred three million, two hundred thirty-one thousand, three hundred twenty-one".