21120304310330 has 16 divisors (see below), whose sum is σ = 38016611449344. Its totient is φ = 8448107570640.

The previous prime is 21120304310257. The next prime is 21120304310359. The reversal of 21120304310330 is 3301340302112.

It is a junction number, because it is equal to n+sod(n) for n = 21120304310296 and 21120304310305.

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, 6213239 + ... + 8991381.

It is an arithmetic number, because the mean of its divisors is an integer number (2376038215584).

Almost surely, 2^{21120304310330} is an apocalyptic number.

21120304310330 is a deficient number, since it is larger than the sum of its proper divisors (16896307139014).

21120304310330 is a wasteful number, since it uses less digits than its factorization.

21120304310330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538381.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21120304310330 its reverse (3301340302112), we get a palindrome (24421644612442).

The spelling of 21120304310330 in words is "twenty-one trillion, one hundred twenty billion, three hundred four million, three hundred ten thousand, three hundred thirty".