21223222013 has 8 divisors (see below), whose sum is σ = 24257313600. Its totient is φ = 18189681120.

The previous prime is 21223221979. The next prime is 21223222019. The reversal of 21223222013 is 31022232212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21223222013 - 2¹⁶ = 21223156477 is a prime.

It is a super-2 number, since 2×21223222013² (a number of 21 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 (21223222019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51488 + ... + 212361.

It is an arithmetic number, because the mean of its divisors is an integer number (3032164200).

Almost surely, 2^21223222013 is an apocalyptic number.

It is an amenable number.

21223222013 is a deficient number, since it is larger than the sum of its proper divisors (3034091587).

21223222013 is a wasteful number, since it uses less digits than its factorization.

21223222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275347.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21223222013 its reverse (31022232212), we get a palindrome (52245454225).

The spelling of 21223222013 in words is "twenty-one billion, two hundred twenty-three million, two hundred twenty-two thousand, thirteen".