21335033351 has 8 divisors (see below), whose sum is σ = 21914313024. Its totient is φ = 20755893600.

The previous prime is 21335033341. The next prime is 21335033353. The reversal of 21335033351 is 15333053312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21335033351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21335033353) 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, 323201 + ... + 383573.

It is an arithmetic number, because the mean of its divisors is an integer number (2739289128).

Almost surely, 2^21335033351 is an apocalyptic number.

21335033351 is a deficient number, since it is larger than the sum of its proper divisors (579279673).

21335033351 is an equidigital number, since it uses as much as digits as its factorization.

21335033351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69961.

The product of its (nonzero) digits is 12150, while the sum is 29.

Adding to 21335033351 its reverse (15333053312), we get a palindrome (36668086663).

The spelling of 21335033351 in words is "twenty-one billion, three hundred thirty-five million, thirty-three thousand, three hundred fifty-one".