10211321321 has 4 divisors (see below), whose sum is σ = 10211615700. Its totient is φ = 10211026944.

The previous prime is 10211321311. The next prime is 10211321363. The reversal of 10211321321 is 12312311201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12312311201 = 19 ⋅648016379.

It can be written as a sum of positive squares in 2 ways, for example, as 4544242921 + 5667078400 = 67411^2 + 75280^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211321321 - 2⁶ = 10211321257 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 10211321321.

It is not an unprimeable number, because it can be changed into a prime (10211321311) 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, 86936 + ... + 167273.

It is an arithmetic number, because the mean of its divisors is an integer number (2552903925).

Almost surely, 2^10211321321 is an apocalyptic number.

It is an amenable number.

10211321321 is a deficient number, since it is larger than the sum of its proper divisors (294379).

10211321321 is an equidigital number, since it uses as much as digits as its factorization.

10211321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294378.

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

Adding to 10211321321 its reverse (12312311201), we get a palindrome (22523632522).

The spelling of 10211321321 in words is "ten billion, two hundred eleven million, three hundred twenty-one thousand, three hundred twenty-one".