21311033021333 has 4 divisors (see below), whose sum is σ = 23248399659648. Its totient is φ = 19373666383020.

The previous prime is 21311033021321. The next prime is 21311033021389. The reversal of 21311033021333 is 33312033011312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21311033021333 - 2¹² = 21311033017237 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 (21311033021303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 968683319141 + ... + 968683319162.

It is an arithmetic number, because the mean of its divisors is an integer number (5812099914912).

Almost surely, 2^{21311033021333} is an apocalyptic number.

It is an amenable number.

21311033021333 is a deficient number, since it is larger than the sum of its proper divisors (1937366638315).

21311033021333 is a wasteful number, since it uses less digits than its factorization.

21311033021333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937366638314.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 21311033021333 its reverse (33312033011312), we get a palindrome (54623066032645).

The spelling of 21311033021333 in words is "twenty-one trillion, three hundred eleven billion, thirty-three million, twenty-one thousand, three hundred thirty-three".