221213230134 has 128 divisors (see below), whose sum is σ = 509828444160. Its totient is φ = 63420153984.

The previous prime is 221213230061. The next prime is 221213230159. The reversal of 221213230134 is 431032312122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81717609 + ... + 81720315.

It is an arithmetic number, because the mean of its divisors is an integer number (3983034720).

Almost surely, 2^221213230134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221213230134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254914222080).

221213230134 is an abundant number, since it is smaller than the sum of its proper divisors (288615214026).

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

221213230134 is a wasteful number, since it uses less digits than its factorization.

221213230134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 221213230134 its reverse (431032312122), we get a palindrome (652245542256).

The spelling of 221213230134 in words is "two hundred twenty-one billion, two hundred thirteen million, two hundred thirty thousand, one hundred thirty-four".