221213010 has 128 divisors (see below), whose sum is σ = 608705280. Its totient is φ = 51093504.

The previous prime is 221213009. The next prime is 221213017. The reversal of 221213010 is 10312122.

It is not an unprimeable number, because it can be changed into a prime (221213017) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 358222 + ... + 358838.

It is an arithmetic number, because the mean of its divisors is an integer number (4755510).

Almost surely, 2^221213010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221213010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304352640).

221213010 is an abundant number, since it is smaller than the sum of its proper divisors (387492270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221213010 is a wasteful number, since it uses less digits than its factorization.

221213010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221213010 is about 14873.2313234213. The cubic root of 221213010 is about 604.7885425432.

Adding to 221213010 its reverse (10312122), we get a palindrome (231525132).

The spelling of 221213010 in words is "two hundred twenty-one million, two hundred thirteen thousand, ten".