10103212321 has 2 divisors, whose sum is σ = 10103212322. Its totient is φ = 10103212320.

The previous prime is 10103212313. The next prime is 10103212403. The reversal of 10103212321 is 12321230101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10022212321 + 81000000 = 100111^2 + 9000^2 .

It is a cyclic number.

It is not a de Polignac number, because 10103212321 - 2³ = 10103212313 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 10103212295 and 10103212304.

It is not a weakly prime, because it can be changed into another prime (10103212621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051606160 + 5051606161.

It is an arithmetic number, because the mean of its divisors is an integer number (5051606161).

Almost surely, 2^10103212321 is an apocalyptic number.

It is an amenable number.

10103212321 is a deficient number, since it is larger than the sum of its proper divisors (1).

10103212321 is an equidigital number, since it uses as much as digits as its factorization.

10103212321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 10103212321 its reverse (12321230101), we get a palindrome (22424442422).

The spelling of 10103212321 in words is "ten billion, one hundred three million, two hundred twelve thousand, three hundred twenty-one".