21330331219 has 4 divisors (see below), whose sum is σ = 21333920296. Its totient is φ = 21326742144.

The previous prime is 21330331201. The next prime is 21330331369. The reversal of 21330331219 is 91213303312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21330331219 is a prime.

It is a super-2 number, since 2×21330331219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330331619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785609 + ... + 1797514.

It is an arithmetic number, because the mean of its divisors is an integer number (5333480074).

Almost surely, 2^21330331219 is an apocalyptic number.

21330331219 is a deficient number, since it is larger than the sum of its proper divisors (3589077).

21330331219 is an equidigital number, since it uses as much as digits as its factorization.

21330331219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589076.

The product of its (nonzero) digits is 2916, while the sum is 28.

The spelling of 21330331219 in words is "twenty-one billion, three hundred thirty million, three hundred thirty-one thousand, two hundred nineteen".