21003003113220 has 144 divisors (see below), whose sum is σ = 63755241758208. Its totient is φ = 5596746865920.

The previous prime is 21003003113093. The next prime is 21003003113231. The reversal of 21003003113220 is 2231130030012.

21003003113220 is a `hidden beast` number, since 2 + 1 + 0 + 0 + 30 + 0 + 311 + 322 + 0 = 666.

It is a super-2 number, since 2×21003003113220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21003003113193 and 21003003113202.

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 47 ways as a sum of consecutive naturals, for example, 2363335617 + ... + 2363344503.

It is an arithmetic number, because the mean of its divisors is an integer number (442744734432).

Almost surely, 2^{21003003113220} is an apocalyptic number.

21003003113220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003003113220 is an abundant number, since it is smaller than the sum of its proper divisors (42752238644988).

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

21003003113220 is a wasteful number, since it uses less digits than its factorization.

21003003113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16930 (or 16925 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21003003113220 its reverse (2231130030012), we get a palindrome (23234133143232).

The spelling of 21003003113220 in words is "twenty-one trillion, three billion, three million, one hundred thirteen thousand, two hundred twenty".