10202312321 has 4 divisors (see below), whose sum is σ = 10276781892. Its totient is φ = 10127842752.

The previous prime is 10202312303. The next prime is 10202312363. The reversal of 10202312321 is 12321320201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12321320201 = 18859 ⋅653339.

It can be written as a sum of positive squares in 2 ways, for example, as 7804839025 + 2397473296 = 88345^2 + 48964^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202312321 - 2²² = 10198118017 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 10202312321.

It is not an unprimeable number, because it can be changed into a prime (10202312521) 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, 37234580 + ... + 37234853.

It is an arithmetic number, because the mean of its divisors is an integer number (2569195473).

Almost surely, 2^10202312321 is an apocalyptic number.

It is an amenable number.

10202312321 is a deficient number, since it is larger than the sum of its proper divisors (74469571).

10202312321 is an equidigital number, since it uses as much as digits as its factorization.

10202312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74469570.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 10202312321 its reverse (12321320201), we get a palindrome (22523632522).

The spelling of 10202312321 in words is "ten billion, two hundred two million, three hundred twelve thousand, three hundred twenty-one".