21220323130 has 8 divisors (see below), whose sum is σ = 38196581652. Its totient is φ = 8488129248.

The previous prime is 21220323127. The next prime is 21220323209. The reversal of 21220323130 is 3132302212.

It can be written as a sum of positive squares in 2 ways, for example, as 20715557041 + 504766089 = 143929^2 + 22467^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21220323130² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21220323098 and 21220323107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061016147 + ... + 1061016166.

Almost surely, 2^21220323130 is an apocalyptic number.

21220323130 is a deficient number, since it is larger than the sum of its proper divisors (16976258522).

21220323130 is a wasteful number, since it uses less digits than its factorization.

21220323130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122032320.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21220323130 its reverse (3132302212), we get a palindrome (24352625342).

The spelling of 21220323130 in words is "twenty-one billion, two hundred twenty million, three hundred twenty-three thousand, one hundred thirty".