31323331201321 has 4 divisors (see below), whose sum is σ = 31445211867732. Its totient is φ = 31201450534912.

The previous prime is 31323331201277. The next prime is 31323331201373. The reversal of 31323331201321 is 12310213332313.

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 24488008543296 + 6835322658025 = 4948536^2 + 2614445^2 .

It is a cyclic number.

It is not a de Polignac number, because 31323331201321 - 2²⁷ = 31323196983593 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 31323331201321.

It is not an unprimeable number, because it can be changed into a prime (31323332201321) 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, 60940332820 + ... + 60940333333.

It is an arithmetic number, because the mean of its divisors is an integer number (7861302966933).

Almost surely, 2^{31323331201321} is an apocalyptic number.

It is an amenable number.

31323331201321 is a deficient number, since it is larger than the sum of its proper divisors (121880666411).

31323331201321 is a wasteful number, since it uses less digits than its factorization.

31323331201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121880666410.

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

Adding to 31323331201321 its reverse (12310213332313), we get a palindrome (43633544533634).

The spelling of 31323331201321 in words is "thirty-one trillion, three hundred twenty-three billion, three hundred thirty-one million, two hundred one thousand, three hundred twenty-one".