10311212321 has 8 divisors (see below), whose sum is σ = 10333357320. Its totient is φ = 10289092608.

The previous prime is 10311212299. The next prime is 10311212323. The reversal of 10311212321 is 12321211301.

It can be written as a sum of positive squares in 4 ways, for example, as 166693921 + 10144518400 = 12911^2 + 100720^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10311212321 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 10311212321.

It is not an unprimeable number, because it can be changed into a prime (10311212323) 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, 962225 + ... + 972881.

It is an arithmetic number, because the mean of its divisors is an integer number (1291669665).

Almost surely, 2^10311212321 is an apocalyptic number.

It is an amenable number.

10311212321 is a deficient number, since it is larger than the sum of its proper divisors (22144999).

10311212321 is a wasteful number, since it uses less digits than its factorization.

10311212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12643.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 10311212321 its reverse (12321211301), we get a palindrome (22632423622).

The spelling of 10311212321 in words is "ten billion, three hundred eleven million, two hundred twelve thousand, three hundred twenty-one".