21011120304 has 20 divisors (see below), whose sum is σ = 54278727576. Its totient is φ = 7003706752.

The previous prime is 21011120279. The next prime is 21011120327. The reversal of 21011120304 is 40302111012.

It is a super-2 number, since 2×21011120304² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218865789 + ... + 218865884.

Almost surely, 2^21011120304 is an apocalyptic number.

21011120304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21011120304 is an abundant number, since it is smaller than the sum of its proper divisors (33267607272).

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

21011120304 is a wasteful number, since it uses less digits than its factorization.

21011120304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437731684 (or 437731678 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21011120304 its reverse (40302111012), we get a palindrome (61313231316).

The spelling of 21011120304 in words is "twenty-one billion, eleven million, one hundred twenty thousand, three hundred four".