21115351333 has 8 divisors (see below), whose sum is σ = 21377552768. Its totient is φ = 20854250064.

The previous prime is 21115351267. The next prime is 21115351337. The reversal of 21115351333 is 33315351112.

It is a happy number.

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-21115351333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115351337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236385 + ... + 313222.

It is an arithmetic number, because the mean of its divisors is an integer number (2672194096).

Almost surely, 2^21115351333 is an apocalyptic number.

It is an amenable number.

21115351333 is a deficient number, since it is larger than the sum of its proper divisors (262201435).

21115351333 is a wasteful number, since it uses less digits than its factorization.

21115351333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550083.

The product of its digits is 4050, while the sum is 28.

The spelling of 21115351333 in words is "twenty-one billion, one hundred fifteen million, three hundred fifty-one thousand, three hundred thirty-three".