21223321312213 has 8 divisors (see below), whose sum is σ = 22146125636736. Its totient is φ = 20300521256400.

The previous prime is 21223321312201. The next prime is 21223321312217. The reversal of 21223321312213 is 31221312332212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223321312213 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 (21223321312217) 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, 13087143 + ... + 14619163.

It is an arithmetic number, because the mean of its divisors is an integer number (2768265704592).

Almost surely, 2^{21223321312213} is an apocalyptic number.

21223321312213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21223321312213 is a deficient number, since it is larger than the sum of its proper divisors (922804324523).

21223321312213 is a wasteful number, since it uses less digits than its factorization.

21223321312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134355.

The product of its digits is 5184, while the sum is 28.

Adding to 21223321312213 its reverse (31221312332212), we get a palindrome (52444633644425).

The spelling of 21223321312213 in words is "twenty-one trillion, two hundred twenty-three billion, three hundred twenty-one million, three hundred twelve thousand, two hundred thirteen".