221144203340 has 24 divisors (see below), whose sum is σ = 464690807280. Its totient is φ = 88402827968.

The previous prime is 221144203321. The next prime is 221144203351. The reversal of 221144203340 is 43302441122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3395270 + ... + 3459789.

It is an arithmetic number, because the mean of its divisors is an integer number (19362116970).

Almost surely, 2^221144203340 is an apocalyptic number.

221144203340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221144203340 is an abundant number, since it is smaller than the sum of its proper divisors (243546603940).

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

221144203340 is a wasteful number, since it uses less digits than its factorization.

221144203340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6856681 (or 6856679 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 221144203340 its reverse (43302441122), we get a palindrome (264446644462).

The spelling of 221144203340 in words is "two hundred twenty-one billion, one hundred forty-four million, two hundred three thousand, three hundred forty".