21113321333 has 32 divisors (see below), whose sum is σ = 23522107392. Its totient is φ = 18830750400.

The previous prime is 21113321321. The next prime is 21113321353. The reversal of 21113321333 is 33312331112.

It is a cyclic number.

It is not a de Polignac number, because 21113321333 - 2⁸ = 21113321077 is a prime.

It is a super-3 number, since 3×21113321333³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21113321299 and 21113321308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113321353) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13789778 + ... + 13791308.

It is an arithmetic number, because the mean of its divisors is an integer number (735065856).

Almost surely, 2^21113321333 is an apocalyptic number.

It is an amenable number.

21113321333 is a deficient number, since it is larger than the sum of its proper divisors (2408786059).

21113321333 is a wasteful number, since it uses less digits than its factorization.

21113321333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905.

The product of its digits is 972, while the sum is 23.

Adding to 21113321333 its reverse (33312331112), we get a palindrome (54425652445).

The spelling of 21113321333 in words is "twenty-one billion, one hundred thirteen million, three hundred twenty-one thousand, three hundred thirty-three".