21113131330 has 8 divisors (see below), whose sum is σ = 38003636412. Its totient is φ = 8445252528.

The previous prime is 21113131301. The next prime is 21113131331. The reversal of 21113131330 is 3313131112.

It can be written as a sum of positive squares in 2 ways, for example, as 18569240361 + 2543890969 = 136269^2 + 50437^2 .

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 = 21113131298 and 21113131307.

It is not an unprimeable number, because it can be changed into a prime (21113131331) 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, 1055656557 + ... + 1055656576.

Almost surely, 2^21113131330 is an apocalyptic number.

21113131330 is a deficient number, since it is larger than the sum of its proper divisors (16890505082).

21113131330 is a wasteful number, since it uses less digits than its factorization.

21113131330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111313140.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21113131330 its reverse (3313131112), we get a palindrome (24426262442).

The spelling of 21113131330 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-one thousand, three hundred thirty".