10021201321 has 4 divisors (see below), whose sum is σ = 10023542100. Its totient is φ = 10018860544.

The previous prime is 10021201313. The next prime is 10021201349. The reversal of 10021201321 is 12310212001.

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 7527297600 + 2493903721 = 86760^2 + 49939^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021201321 - 2³ = 10021201313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10021201621) 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, 1163956 + ... + 1172533.

It is an arithmetic number, because the mean of its divisors is an integer number (2505885525).

Almost surely, 2^10021201321 is an apocalyptic number.

It is an amenable number.

10021201321 is a deficient number, since it is larger than the sum of its proper divisors (2340779).

10021201321 is an equidigital number, since it uses as much as digits as its factorization.

10021201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340778.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 10021201321 its reverse (12310212001), we get a palindrome (22331413322).

The spelling of 10021201321 in words is "ten billion, twenty-one million, two hundred one thousand, three hundred twenty-one".