10312221321 has 16 divisors (see below), whose sum is σ = 15335464320. Its totient is φ = 6848669520.

The previous prime is 10312221307. The next prime is 10312221323. The reversal of 10312221321 is 12312221301.

10312221321 is a `hidden beast` number, since 10 + 312 + 2 + 21 + 321 = 666.

It is not a de Polignac number, because 10312221321 - 2¹³ = 10312213129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10312221294 and 10312221303.

It is not an unprimeable number, because it can be changed into a prime (10312221323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719010 + ... + 733211.

It is an arithmetic number, because the mean of its divisors is an integer number (958466520).

Almost surely, 2^10312221321 is an apocalyptic number.

It is an amenable number.

10312221321 is a deficient number, since it is larger than the sum of its proper divisors (5023242999).

10312221321 is a wasteful number, since it uses less digits than its factorization.

10312221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452493 (or 1452487 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 10312221321 its reverse (12312221301), we get a palindrome (22624442622).

The spelling of 10312221321 in words is "ten billion, three hundred twelve million, two hundred twenty-one thousand, three hundred twenty-one".