21331023230213 has 16 divisors (see below), whose sum is σ = 21760528870080. Its totient is φ = 20906495280000.

The previous prime is 21331023230201. The next prime is 21331023230219. The reversal of 21331023230213 is 31203232013312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21331023230213 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 (21331023230219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2788838 + ... + 7102088.

It is an arithmetic number, because the mean of its divisors is an integer number (1360033054380).

Almost surely, 2^{21331023230213} is an apocalyptic number.

It is an amenable number.

21331023230213 is a deficient number, since it is larger than the sum of its proper divisors (429505639867).

21331023230213 is a wasteful number, since it uses less digits than its factorization.

21331023230213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313828.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21331023230213 its reverse (31203232013312), we get a palindrome (52534255243525).

The spelling of 21331023230213 in words is "twenty-one trillion, three hundred thirty-one billion, twenty-three million, two hundred thirty thousand, two hundred thirteen".