221002213 has 4 divisors (see below), whose sum is σ = 221032000. Its totient is φ = 220972428.

The previous prime is 221002211. The next prime is 221002231. The reversal of 221002213 is 312200122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221002213 - 2¹ = 221002211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221002193 and 221002202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6106 + ... + 21892.

It is an arithmetic number, because the mean of its divisors is an integer number (55258000).

Almost surely, 2^221002213 is an apocalyptic number.

It is an amenable number.

221002213 is a deficient number, since it is larger than the sum of its proper divisors (29787).

221002213 is a wasteful number, since it uses less digits than its factorization.

221002213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29786.

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

The square root of 221002213 is about 14866.1431783768. The cubic root of 221002213 is about 604.5963776448.

Adding to 221002213 its reverse (312200122), we get a palindrome (533202335).

The spelling of 221002213 in words is "two hundred twenty-one million, two thousand, two hundred thirteen".