21221133130 has 8 divisors (see below), whose sum is σ = 38198039652. Its totient is φ = 8488453248.

The previous prime is 21221133113. The next prime is 21221133161. The reversal of 21221133130 is 3133112212.

It can be written as a sum of positive squares in 2 ways, for example, as 19096199721 + 2124933409 = 138189^2 + 46097^2 .

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 = 21221133098 and 21221133107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061056647 + ... + 1061056666.

Almost surely, 2^21221133130 is an apocalyptic number.

21221133130 is a deficient number, since it is larger than the sum of its proper divisors (16976906522).

21221133130 is a wasteful number, since it uses less digits than its factorization.

21221133130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122113320.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21221133130 its reverse (3133112212), we get a palindrome (24354245342).

The spelling of 21221133130 in words is "twenty-one billion, two hundred twenty-one million, one hundred thirty-three thousand, one hundred thirty".