21311023333 has 8 divisors (see below), whose sum is σ = 22438028000. Its totient is φ = 20184555888.

The previous prime is 21311023303. The next prime is 21311023343. The reversal of 21311023333 is 33332011312.

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 21311023333 - 2⁵ = 21311023301 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 (21311023303) 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, 51558 + ... + 212791.

It is an arithmetic number, because the mean of its divisors is an integer number (2804753500).

Almost surely, 2^21311023333 is an apocalyptic number.

It is an amenable number.

21311023333 is a deficient number, since it is larger than the sum of its proper divisors (1127004667).

21311023333 is a wasteful number, since it uses less digits than its factorization.

21311023333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268611.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21311023333 its reverse (33332011312), we get a palindrome (54643034645).

The spelling of 21311023333 in words is "twenty-one billion, three hundred eleven million, twenty-three thousand, three hundred thirty-three".