221230311213 has 16 divisors (see below), whose sum is σ = 296205092352. Its totient is φ = 146872110000.

The previous prime is 221230311173. The next prime is 221230311233. The reversal of 221230311213 is 312113032122.

221230311213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221230311213 - 2⁶ = 221230311149 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221230311213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221230311233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867778 + ... + 1093388.

It is an arithmetic number, because the mean of its divisors is an integer number (18512818272).

Almost surely, 2^221230311213 is an apocalyptic number.

It is an amenable number.

221230311213 is a deficient number, since it is larger than the sum of its proper divisors (74974781139).

221230311213 is a wasteful number, since it uses less digits than its factorization.

221230311213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226976.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221230311213 its reverse (312113032122), we get a palindrome (533343343335).

The spelling of 221230311213 in words is "two hundred twenty-one billion, two hundred thirty million, three hundred eleven thousand, two hundred thirteen".