30721228403 has 2 divisors, whose sum is σ = 30721228404. Its totient is φ = 30721228402.

The previous prime is 30721228397. The next prime is 30721228441. The reversal of 30721228403 is 30482212703.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30721228403 - 2⁶ = 30721228339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30721228403.

It is not a weakly prime, because it can be changed into another prime (30721228103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15360614201 + 15360614202.

It is an arithmetic number, because the mean of its divisors is an integer number (15360614202).

Almost surely, 2^30721228403 is an apocalyptic number.

30721228403 is a deficient number, since it is larger than the sum of its proper divisors (1).

30721228403 is an equidigital number, since it uses as much as digits as its factorization.

30721228403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 30721228403 in words is "thirty billion, seven hundred twenty-one million, two hundred twenty-eight thousand, four hundred three".