221302343424340 has 12 divisors (see below), whose sum is σ = 464734921191156. Its totient is φ = 88520937369728.

The previous prime is 221302343424319. The next prime is 221302343424367. The reversal of 221302343424340 is 43424343203122.

221302343424340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 66335747144976 + 154966596279364 = 8144676^2 + 12448558^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221302343424340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5532558585589 + ... + 5532558585628.

It is an arithmetic number, because the mean of its divisors is an integer number (38727910099263).

Almost surely, 2^{221302343424340} is an apocalyptic number.

221302343424340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221302343424340 is an abundant number, since it is smaller than the sum of its proper divisors (243432577766816).

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

221302343424340 is a wasteful number, since it uses less digits than its factorization.

221302343424340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11065117171226 (or 11065117171224 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 37.

Adding to 221302343424340 its reverse (43424343203122), we get a palindrome (264726686627462).

The spelling of 221302343424340 in words is "two hundred twenty-one trillion, three hundred two billion, three hundred forty-three million, four hundred twenty-four thousand, three hundred forty".