21311300330 has 16 divisors (see below), whose sum is σ = 39397107240. Its totient is φ = 8294127552.

The previous prime is 21311300327. The next prime is 21311300341. The reversal of 21311300330 is 3300311312.

It can be written as a sum of positive squares in 4 ways, for example, as 21260847721 + 50452609 = 145811^2 + 7103^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21311300299 and 21311300308.

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, 28798685 + ... + 28799424.

Almost surely, 2^21311300330 is an apocalyptic number.

21311300330 is a deficient number, since it is larger than the sum of its proper divisors (18085806910).

21311300330 is a wasteful number, since it uses less digits than its factorization.

21311300330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57598153.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21311300330 its reverse (3300311312), we get a palindrome (24611611642).

The spelling of 21311300330 in words is "twenty-one billion, three hundred eleven million, three hundred thousand, three hundred thirty".