21021131323333 has 8 divisors (see below), whose sum is σ = 22130705797920. Its totient is φ = 19911876762960.

The previous prime is 21021131323303. The next prime is 21021131323343. The reversal of 21021131323333 is 33332313112012.

It is a happy number.

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

It is not a de Polignac number, because 21021131323333 - 2²⁹ = 21020594452421 is a prime.

It is a super-2 number, since 2×21021131323333² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021131323303) 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 7 ways as a sum of consecutive naturals, for example, 79843663 + ... + 80106508.

It is an arithmetic number, because the mean of its divisors is an integer number (2766338224740).

Almost surely, 2^{21021131323333} is an apocalyptic number.

It is an amenable number.

21021131323333 is a deficient number, since it is larger than the sum of its proper divisors (1109574474587).

21021131323333 is a wasteful number, since it uses less digits than its factorization.

21021131323333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159957107.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 21021131323333 its reverse (33332313112012), we get a palindrome (54353444435345).

The spelling of 21021131323333 in words is "twenty-one trillion, twenty-one billion, one hundred thirty-one million, three hundred twenty-three thousand, three hundred thirty-three".