21002213330 has 32 divisors (see below), whose sum is σ = 45083015424. Its totient is φ = 6887681856.

The previous prime is 21002213329. The next prime is 21002213347. The reversal of 21002213330 is 3331220012.

It is a junction number, because it is equal to n+sod(n) for n = 21002213299 and 21002213308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6520817 + ... + 6524036.

It is an arithmetic number, because the mean of its divisors is an integer number (1408844232).

Almost surely, 2^21002213330 is an apocalyptic number.

21002213330 is an abundant number, since it is smaller than the sum of its proper divisors (24080802094).

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

21002213330 is a wasteful number, since it uses less digits than its factorization.

21002213330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13044890.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21002213330 its reverse (3331220012), we get a palindrome (24333433342).

The spelling of 21002213330 in words is "twenty-one billion, two million, two hundred thirteen thousand, three hundred thirty".