10023321221 has 2 divisors, whose sum is σ = 10023321222. Its totient is φ = 10023321220.

The previous prime is 10023321211. The next prime is 10023321223. The reversal of 10023321221 is 12212332001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9431128996 + 592192225 = 97114^2 + 24335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10023321221 is a prime.

It is a Sophie Germain prime.

Together with 10023321223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10023321221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10023321223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5011660610 + 5011660611.

It is an arithmetic number, because the mean of its divisors is an integer number (5011660611).

Almost surely, 2^10023321221 is an apocalyptic number.

It is an amenable number.

10023321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10023321221 is an equidigital number, since it uses as much as digits as its factorization.

10023321221 is an evil number, because the sum of its binary digits is even.

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

Adding to 10023321221 its reverse (12212332001), we get a palindrome (22235653222).

The spelling of 10023321221 in words is "ten billion, twenty-three million, three hundred twenty-one thousand, two hundred twenty-one".