10521242321 has 2 divisors, whose sum is σ = 10521242322. Its totient is φ = 10521242320.

The previous prime is 10521242299. The next prime is 10521242351. The reversal of 10521242321 is 12324212501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9797040400 + 724201921 = 98980^2 + 26911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10521242321 is a prime.

It is a super-2 number, since 2×10521242321² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10521242351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260621160 + 5260621161.

It is an arithmetic number, because the mean of its divisors is an integer number (5260621161).

Almost surely, 2^10521242321 is an apocalyptic number.

It is an amenable number.

10521242321 is a deficient number, since it is larger than the sum of its proper divisors (1).

10521242321 is an equidigital number, since it uses as much as digits as its factorization.

10521242321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 10521242321 its reverse (12324212501), we get a palindrome (22845454822).

The spelling of 10521242321 in words is "ten billion, five hundred twenty-one million, two hundred forty-two thousand, three hundred twenty-one".