21120030323 has 6 divisors (see below), whose sum is σ = 24568198596. Its totient is φ = 18102883092.

The previous prime is 21120030313. The next prime is 21120030341. The reversal of 21120030323 is 32303002112.

It is not a de Polignac number, because 21120030323 - 2⁴ = 21120030307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120030313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215510465 + ... + 215510562.

It is an arithmetic number, because the mean of its divisors is an integer number (4094699766).

Almost surely, 2^21120030323 is an apocalyptic number.

21120030323 is a deficient number, since it is larger than the sum of its proper divisors (3448168273).

21120030323 is an equidigital number, since it uses as much as digits as its factorization.

21120030323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431021041 (or 431021034 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21120030323 its reverse (32303002112), we get a palindrome (53423032435).

The spelling of 21120030323 in words is "twenty-one billion, one hundred twenty million, thirty thousand, three hundred twenty-three".