21003300003120 has 40 divisors (see below), whose sum is σ = 65110230010416. Its totient is φ = 5600880000768.

The previous prime is 21003300003113. The next prime is 21003300003199. The reversal of 21003300003120 is 2130000330012.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×21003300003120² (a number of 27 digits) contains 22 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 21003300003120.

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, 43756874767 + ... + 43756875246.

Almost surely, 2^{21003300003120} is an apocalyptic number.

21003300003120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003300003120 is an abundant number, since it is smaller than the sum of its proper divisors (44106930007296).

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

21003300003120 is a wasteful number, since it uses less digits than its factorization.

21003300003120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87513750029 (or 87513750023 counting only the distinct ones).

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

Adding to 21003300003120 its reverse (2130000330012), we get a palindrome (23133300333132).

The spelling of 21003300003120 in words is "twenty-one trillion, three billion, three hundred million, three thousand, one hundred twenty".