21333313213 has 8 divisors (see below), whose sum is σ = 21583882080. Its totient is φ = 21083692560.

The previous prime is 21333313201. The next prime is 21333313219. The reversal of 21333313213 is 31231333312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21333313213 - 2¹⁷ = 21333182141 is a prime.

It is a super-2 number, since 2×21333313213² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333313219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 191743 + ... + 281836.

It is an arithmetic number, because the mean of its divisors is an integer number (2697985260).

Almost surely, 2^21333313213 is an apocalyptic number.

It is an amenable number.

21333313213 is a deficient number, since it is larger than the sum of its proper divisors (250568867).

21333313213 is a wasteful number, since it uses less digits than its factorization.

21333313213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474107.

The product of its digits is 2916, while the sum is 25.

Adding to 21333313213 its reverse (31231333312), we get a palindrome (52564646525).

The spelling of 21333313213 in words is "twenty-one billion, three hundred thirty-three million, three hundred thirteen thousand, two hundred thirteen".