221022013 has 8 divisors (see below), whose sum is σ = 224364800. Its totient is φ = 217693008.

The previous prime is 221022007. The next prime is 221022017. The reversal of 221022013 is 310220122.

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-221022013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221021984 and 221022002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31495 + ... + 37867.

It is an arithmetic number, because the mean of its divisors is an integer number (28045600).

Almost surely, 2^221022013 is an apocalyptic number.

It is an amenable number.

221022013 is a deficient number, since it is larger than the sum of its proper divisors (3342787).

221022013 is an equidigital number, since it uses as much as digits as its factorization.

221022013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6891.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221022013 is about 14866.8091061936. The cubic root of 221022013 is about 604.6144327442.

Adding to 221022013 its reverse (310220122), we get a palindrome (531242135).

The spelling of 221022013 in words is "two hundred twenty-one million, twenty-two thousand, thirteen".