31103312233321 has 4 divisors (see below), whose sum is σ = 31104078799572. Its totient is φ = 31102545667072.

The previous prime is 31103312233267. The next prime is 31103312233333. The reversal of 31103312233321 is 12333221330113.

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 10030117025296 + 21073195208025 = 3167036^2 + 4590555^2 .

It is a cyclic number.

It is not a de Polignac number, because 31103312233321 - 2¹³ = 31103312225129 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 31103312233321.

It is not an unprimeable number, because it can be changed into a prime (31103312234321) 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, 383222260 + ... + 383303413.

It is an arithmetic number, because the mean of its divisors is an integer number (7776019699893).

Almost surely, 2^{31103312233321} is an apocalyptic number.

It is an amenable number.

31103312233321 is a deficient number, since it is larger than the sum of its proper divisors (766566251).

31103312233321 is an equidigital number, since it uses as much as digits as its factorization.

31103312233321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766566250.

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

Adding to 31103312233321 its reverse (12333221330113), we get a palindrome (43436533563434).

The spelling of 31103312233321 in words is "thirty-one trillion, one hundred three billion, three hundred twelve million, two hundred thirty-three thousand, three hundred twenty-one".