10403400221 has 2 divisors, whose sum is σ = 10403400222. Its totient is φ = 10403400220.

The previous prime is 10403400197. The next prime is 10403400247. The reversal of 10403400221 is 12200430401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10259664100 + 143736121 = 101290^2 + 11989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10403400221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10403400221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10403400421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5201700110 + 5201700111.

It is an arithmetic number, because the mean of its divisors is an integer number (5201700111).

Almost surely, 2^10403400221 is an apocalyptic number.

It is an amenable number.

10403400221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10403400221 is an equidigital number, since it uses as much as digits as its factorization.

10403400221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 10403400221 its reverse (12200430401), we get a palindrome (22603830622).

The spelling of 10403400221 in words is "ten billion, four hundred three million, four hundred thousand, two hundred twenty-one".