221234412340 has 24 divisors (see below), whose sum is σ = 464647492512. Its totient is φ = 88483245600.

The previous prime is 221234412313. The next prime is 221234412349. The reversal of 221234412340 is 43214432122.

It is a junction number, because it is equal to n+sod(n) for n = 221234412299 and 221234412308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221234412349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483886 + ... + 822565.

It is an arithmetic number, because the mean of its divisors is an integer number (19360312188).

Almost surely, 2^221234412340 is an apocalyptic number.

221234412340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221234412340 is an abundant number, since it is smaller than the sum of its proper divisors (243413080172).

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

221234412340 is a wasteful number, since it uses less digits than its factorization.

221234412340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314927 (or 1314925 counting only the distinct ones).

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

Adding to 221234412340 its reverse (43214432122), we get a palindrome (264448844462).

The spelling of 221234412340 in words is "two hundred twenty-one billion, two hundred thirty-four million, four hundred twelve thousand, three hundred forty".