21222132130 has 16 divisors (see below), whose sum is σ = 38202947640. Its totient is φ = 8488161792.

The previous prime is 21222132119. The next prime is 21222132149. The reversal of 21222132130 is 3123122212.

It can be written as a sum of positive squares in 4 ways, for example, as 17025813289 + 4196318841 = 130483^2 + 64779^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21222132098 and 21222132107.

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, 53362 + ... + 212818.

Almost surely, 2^21222132130 is an apocalyptic number.

21222132130 is a deficient number, since it is larger than the sum of its proper divisors (16980815510).

21222132130 is a wasteful number, since it uses less digits than its factorization.

21222132130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172773.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21222132130 its reverse (3123122212), we get a palindrome (24345254342).

The spelling of 21222132130 in words is "twenty-one billion, two hundred twenty-two million, one hundred thirty-two thousand, one hundred thirty".