221240240340 has 96 divisors (see below), whose sum is σ = 715267547904. Its totient is φ = 50047856640.

The previous prime is 221240240327. The next prime is 221240240341. The reversal of 221240240340 is 43042042122.

It is a self number, because there is not a number n which added to its sum of digits gives 221240240340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221240240341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2674531 + ... + 2756010.

It is an arithmetic number, because the mean of its divisors is an integer number (7450703624).

Almost surely, 2^221240240340 is an apocalyptic number.

221240240340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221240240340 is an abundant number, since it is smaller than the sum of its proper divisors (494027307564).

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

221240240340 is a wasteful number, since it uses less digits than its factorization.

221240240340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5430657 (or 5430655 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 221240240340 its reverse (43042042122), we get a palindrome (264282282462).

The spelling of 221240240340 in words is "two hundred twenty-one billion, two hundred forty million, two hundred forty thousand, three hundred forty".