21331320003213 has 48 divisors (see below), whose sum is σ = 32166720098688. Its totient is φ = 12555410313600.

The previous prime is 21331320003163. The next prime is 21331320003233. The reversal of 21331320003213 is 31230002313312.

It is not a de Polignac number, because 21331320003213 - 2¹² = 21331319999117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331320003233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5798320 + ... + 8734022.

It is an arithmetic number, because the mean of its divisors is an integer number (670140002056).

Almost surely, 2^{21331320003213} is an apocalyptic number.

It is an amenable number.

21331320003213 is a deficient number, since it is larger than the sum of its proper divisors (10835400095475).

21331320003213 is a wasteful number, since it uses less digits than its factorization.

21331320003213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936306 (or 2936295 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21331320003213 its reverse (31230002313312), we get a palindrome (52561322316525).

The spelling of 21331320003213 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred twenty million, three thousand, two hundred thirteen".