221222440101440 has 56 divisors (see below), whose sum is σ = 526806199966392. Its totient is φ = 88485572034560.

The previous prime is 221222440101437. The next prime is 221222440101497. The reversal of 221222440101440 is 44101044222122.

It can be written as a sum of positive squares in 4 ways, for example, as 136854247134784 + 84368192966656 = 11698472^2 + 9185216^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4957169 + ... + 21610608.

Almost surely, 2^{221222440101440} is an apocalyptic number.

221222440101440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222440101440 is an abundant number, since it is smaller than the sum of its proper divisors (305583759864952).

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

221222440101440 is a wasteful number, since it uses less digits than its factorization.

221222440101440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26593815 (or 26593805 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 221222440101440 its reverse (44101044222122), we get a palindrome (265323484323562).

The spelling of 221222440101440 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, four hundred forty million, one hundred one thousand, four hundred forty".