221202213 has 16 divisors (see below), whose sum is σ = 297257280. Its totient is φ = 146313216.

The previous prime is 221202211. The next prime is 221202239. The reversal of 221202213 is 312202122.

It is a happy number.

It is not a de Polignac number, because 221202213 - 2¹ = 221202211 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221202192 and 221202201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221202211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291831 + ... + 292587.

It is an arithmetic number, because the mean of its divisors is an integer number (18578580).

Almost surely, 2^221202213 is an apocalyptic number.

It is an amenable number.

221202213 is a deficient number, since it is larger than the sum of its proper divisors (76055067).

221202213 is a wasteful number, since it uses less digits than its factorization.

221202213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 221202213 is about 14872.8683514647. The cubic root of 221202213 is about 604.7787028444.

Adding to 221202213 its reverse (312202122), we get a palindrome (533404335).

Subtracting 221202213 from its reverse (312202122), we obtain a palindrome (90999909).

The spelling of 221202213 in words is "two hundred twenty-one million, two hundred two thousand, two hundred thirteen".