21224144210 has 16 divisors (see below), whose sum is σ = 38254890816. Its totient is φ = 8478228528.

The previous prime is 21224144197. The next prime is 21224144219. The reversal of 21224144210 is 1244142212.

It is not an unprimeable number, because it can be changed into a prime (21224144219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420844 + ... + 1435703.

It is an arithmetic number, because the mean of its divisors is an integer number (2390930676).

Almost surely, 2^21224144210 is an apocalyptic number.

21224144210 is a deficient number, since it is larger than the sum of its proper divisors (17030746606).

21224144210 is a wasteful number, since it uses less digits than its factorization.

21224144210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857297.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21224144210 its reverse (1244142212), we get a palindrome (22468286422).

The spelling of 21224144210 in words is "twenty-one billion, two hundred twenty-four million, one hundred forty-four thousand, two hundred ten".