10321310021 has 4 divisors (see below), whose sum is σ = 11259610944. Its totient is φ = 9383009100.

The previous prime is 10321310003. The next prime is 10321310033. The reversal of 10321310021 is 12001312301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10321310021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10321309978 and 10321310005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10321313021) 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, 469150445 + ... + 469150466.

It is an arithmetic number, because the mean of its divisors is an integer number (2814902736).

Almost surely, 2^10321310021 is an apocalyptic number.

10321310021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10321310021 is a deficient number, since it is larger than the sum of its proper divisors (938300923).

10321310021 is an equidigital number, since it uses as much as digits as its factorization.

10321310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938300922.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 10321310021 its reverse (12001312301), we get a palindrome (22322622322).

The spelling of 10321310021 in words is "ten billion, three hundred twenty-one million, three hundred ten thousand, twenty-one".