21130322 has 8 divisors (see below), whose sum is σ = 31976316. Its totient is φ = 10471552.

The previous prime is 21130321. The next prime is 21130331. The reversal of 21130322 is 22303112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20693401 + 436921 = 4549^2 + 661^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21130297 and 21130306.

It is not an unprimeable number, because it can be changed into a prime (21130321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46523 + ... + 46974.

Almost surely, 2^21130322 is an apocalyptic number.

21130322 is a deficient number, since it is larger than the sum of its proper divisors (10845994).

21130322 is a wasteful number, since it uses less digits than its factorization.

21130322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93612.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21130322 is about 4596.7729985284. The cubic root of 21130322 is about 276.4619530461.

Adding to 21130322 its reverse (22303112), we get a palindrome (43433434).

The spelling of 21130322 in words is "twenty-one million, one hundred thirty thousand, three hundred twenty-two".