21011430120 has 64 divisors (see below), whose sum is σ = 65774920320. Its totient is φ = 5359436544.

The previous prime is 21011430119. The next prime is 21011430151. The reversal of 21011430120 is 2103411012.

It is a super-3 number, since 3×21011430120³ (a number of 32 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21011430120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3803659 + ... + 3809178.

It is an arithmetic number, because the mean of its divisors is an integer number (1027733130).

Almost surely, 2^21011430120 is an apocalyptic number.

21011430120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011430120 is an abundant number, since it is smaller than the sum of its proper divisors (44763490200).

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

21011430120 is a wasteful number, since it uses less digits than its factorization.

21011430120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612874 (or 7612870 counting only the distinct ones).

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

Adding to 21011430120 its reverse (2103411012), we get a palindrome (23114841132).

The spelling of 21011430120 in words is "twenty-one billion, eleven million, four hundred thirty thousand, one hundred twenty".