21224240002 has 32 divisors (see below), whose sum is σ = 38550211200. Its totient is φ = 8555362560.

The previous prime is 21224239991. The next prime is 21224240071. The reversal of 21224240002 is 20004242212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339877 + ... + 397447.

It is an arithmetic number, because the mean of its divisors is an integer number (1204694100).

Almost surely, 2^21224240002 is an apocalyptic number.

21224240002 is a deficient number, since it is larger than the sum of its proper divisors (17325971198).

21224240002 is a wasteful number, since it uses less digits than its factorization.

21224240002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59146.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 21224240002 its reverse (20004242212), we get a palindrome (41228482214).

The spelling of 21224240002 in words is "twenty-one billion, two hundred twenty-four million, two hundred forty thousand, two".