221312330340 has 48 divisors (see below), whose sum is σ = 634085567808. Its totient is φ = 57644141184.

The previous prime is 221312330269. The next prime is 221312330347. The reversal of 221312330340 is 43033213122.

221312330340 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221312330340.

It is not an unprimeable number, because it can be changed into a prime (221312330347) 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, 42887407 + ... + 42892566.

It is an arithmetic number, because the mean of its divisors is an integer number (13210115996).

Almost surely, 2^221312330340 is an apocalyptic number.

221312330340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221312330340 is an abundant number, since it is smaller than the sum of its proper divisors (412773237468).

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

221312330340 is a wasteful number, since it uses less digits than its factorization.

221312330340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85780028 (or 85780026 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 221312330340 its reverse (43033213122), we get a palindrome (264345543462).

The spelling of 221312330340 in words is "two hundred twenty-one billion, three hundred twelve million, three hundred thirty thousand, three hundred forty".