21241302999 has 32 divisors (see below), whose sum is σ = 34493644800. Its totient is φ = 11363116512.

The previous prime is 21241302997. The next prime is 21241303003. The reversal of 21241302999 is 99920314212.

It is not a de Polignac number, because 21241302999 - 2¹ = 21241302997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21241302999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241302997) 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 in 31 ways as a sum of consecutive naturals, for example, 445149 + ... + 490550.

It is an arithmetic number, because the mean of its divisors is an integer number (1077926400).

Almost surely, 2^21241302999 is an apocalyptic number.

21241302999 is a deficient number, since it is larger than the sum of its proper divisors (13252341801).

21241302999 is a wasteful number, since it uses less digits than its factorization.

21241302999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935779.

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 21241302999 in words is "twenty-one billion, two hundred forty-one million, three hundred two thousand, nine hundred ninety-nine".