221234413240 has 32 divisors (see below), whose sum is σ = 497868120000. Its totient is φ = 88477642624.

The previous prime is 221234413217. The next prime is 221234413249. The reversal of 221234413240 is 42314432122.

221234413240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221234413199 and 221234413208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221234413249) 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 7 ways as a sum of consecutive naturals, for example, 280315 + ... + 721834.

It is an arithmetic number, because the mean of its divisors is an integer number (15558378750).

Almost surely, 2^221234413240 is an apocalyptic number.

221234413240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221234413240 is an abundant number, since it is smaller than the sum of its proper divisors (276633706760).

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

221234413240 is a wasteful number, since it uses less digits than its factorization.

221234413240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007679 (or 1007675 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 221234413240 its reverse (42314432122), we get a palindrome (263548845362).

The spelling of 221234413240 in words is "two hundred twenty-one billion, two hundred thirty-four million, four hundred thirteen thousand, two hundred forty".