21001300230120 has 192 divisors, whose sum is σ = 73596910521600. Its totient is φ = 4780211950080.

The previous prime is 21001300230109. The next prime is 21001300230149. The reversal of 21001300230120 is 2103200310012.

It is a super-2 number, since 2×21001300230120² (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 21001300230120.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6066751 + ... + 8877390.

It is an arithmetic number, because the mean of its divisors is an integer number (383317242300).

Almost surely, 2^{21001300230120} is an apocalyptic number.

21001300230120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21001300230120 is an abundant number, since it is smaller than the sum of its proper divisors (52595610291480).

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

21001300230120 is a wasteful number, since it uses less digits than its factorization.

21001300230120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14944408 (or 14944397 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21001300230120 its reverse (2103200310012), we get a palindrome (23104500540132).

The spelling of 21001300230120 in words is "twenty-one trillion, one billion, three hundred million, two hundred thirty thousand, one hundred twenty".