21224400322 has 16 divisors (see below), whose sum is σ = 33387753600. Its totient is φ = 10099786752.

The previous prime is 21224400269. The next prime is 21224400331. The reversal of 21224400322 is 22300442212.

It is a junction number, because it is equal to n+sod(n) for n = 21224400293 and 21224400302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1150143 + ... + 1168450.

It is an arithmetic number, because the mean of its divisors is an integer number (2086734600).

Almost surely, 2^21224400322 is an apocalyptic number.

21224400322 is a deficient number, since it is larger than the sum of its proper divisors (12163353278).

21224400322 is a wasteful number, since it uses less digits than its factorization.

21224400322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318817.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21224400322 its reverse (22300442212), we get a palindrome (43524842534).

The spelling of 21224400322 in words is "twenty-one billion, two hundred twenty-four million, four hundred thousand, three hundred twenty-two".