222013021 has 8 divisors (see below), whose sum is σ = 225628344. Its totient is φ = 218426880.

The previous prime is 222013003. The next prime is 222013027. The reversal of 222013021 is 120310222.

It can be written as a sum of positive squares in 4 ways, for example, as 10310521 + 211702500 = 3211^2 + 14550^2 .

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 222013021 - 2⁹ = 222012509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222012992 and 222013010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222013027) 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, 8311 + ... + 22651.

It is an arithmetic number, because the mean of its divisors is an integer number (28203543).

Almost surely, 2^222013021 is an apocalyptic number.

It is an amenable number.

222013021 is a deficient number, since it is larger than the sum of its proper divisors (3615323).

222013021 is a wasteful number, since it uses less digits than its factorization.

222013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14591.

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

The square root of 222013021 is about 14900.1013754941. The cubic root of 222013021 is about 605.5167326768.

Adding to 222013021 its reverse (120310222), we get a palindrome (342323243).

The spelling of 222013021 in words is "two hundred twenty-two million, thirteen thousand, twenty-one".