31320330021121 has 4 divisors (see below), whose sum is σ = 31320341683200. Its totient is φ = 31320318359044.

The previous prime is 31320330021083. The next prime is 31320330021151. The reversal of 31320330021121 is 12112003302313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31320330021121 - 2¹¹ = 31320330019073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31320330021092 and 31320330021101.

It is not an unprimeable number, because it can be changed into a prime (31320330021151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459600 + ... + 7927918.

It is an arithmetic number, because the mean of its divisors is an integer number (7830085420800).

Almost surely, 2^{31320330021121} is an apocalyptic number.

It is an amenable number.

31320330021121 is a deficient number, since it is larger than the sum of its proper divisors (11662079).

31320330021121 is an equidigital number, since it uses as much as digits as its factorization.

31320330021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11662078.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31320330021121 its reverse (12112003302313), we get a palindrome (43432333323434).

The spelling of 31320330021121 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirty million, twenty-one thousand, one hundred twenty-one".