21222003010 has 32 divisors (see below), whose sum is σ = 41701590000. Its totient is φ = 7728473088.

The previous prime is 21222002999. The next prime is 21222003031. The reversal of 21222003010 is 1030022212.

It can be written as a sum of positive squares in 8 ways, for example, as 9945474529 + 11276528481 = 99727^2 + 106191^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1108635 + ... + 1127614.

Almost surely, 2^21222003010 is an apocalyptic number.

21222003010 is a deficient number, since it is larger than the sum of its proper divisors (20479586990).

21222003010 is a wasteful number, since it uses less digits than its factorization.

21222003010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236342.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21222003010 its reverse (1030022212), we get a palindrome (22252025222).

The spelling of 21222003010 in words is "twenty-one billion, two hundred twenty-two million, three thousand, ten".