21120030330 has 64 divisors (see below), whose sum is σ = 58318099200. Its totient is φ = 4795029504.

The previous prime is 21120030313. The next prime is 21120030341. The reversal of 21120030330 is 3303002112.

It is a super-2 number, since 2×21120030330² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 306199 + ... + 368778.

It is an arithmetic number, because the mean of its divisors is an integer number (911220300).

Almost surely, 2^21120030330 is an apocalyptic number.

21120030330 is an abundant number, since it is smaller than the sum of its proper divisors (37198068870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120030330 is a wasteful number, since it uses less digits than its factorization.

21120030330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675143.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21120030330 its reverse (3303002112), we get a palindrome (24423032442).

The spelling of 21120030330 in words is "twenty-one billion, one hundred twenty million, thirty thousand, three hundred thirty".