10421390449 has 2 divisors, whose sum is σ = 10421390450. Its totient is φ = 10421390448.

The previous prime is 10421390393. The next prime is 10421390453. The reversal of 10421390449 is 94409312401.

10421390449 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5413280625 + 5008109824 = 73575^2 + 70768^2 .

It is a cyclic number.

It is not a de Polignac number, because 10421390449 - 2¹⁹ = 10420866161 is a prime.

It is not a weakly prime, because it can be changed into another prime (10421390489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210695224 + 5210695225.

It is an arithmetic number, because the mean of its divisors is an integer number (5210695225).

Almost surely, 2^10421390449 is an apocalyptic number.

It is an amenable number.

10421390449 is a deficient number, since it is larger than the sum of its proper divisors (1).

10421390449 is an equidigital number, since it uses as much as digits as its factorization.

10421390449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 10421390449 in words is "ten billion, four hundred twenty-one million, three hundred ninety thousand, four hundred forty-nine".