221440400022 has 16 divisors (see below), whose sum is σ = 443465856432. Its totient is φ = 73715957280.

The previous prime is 221440400009. The next prime is 221440400029. The reversal of 221440400022 is 220004044122.

221440400022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221440400029) 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 7 ways as a sum of consecutive naturals, for example, 24372429 + ... + 24381512.

It is an arithmetic number, because the mean of its divisors is an integer number (27716616027).

Almost surely, 2^221440400022 is an apocalyptic number.

221440400022 is an abundant number, since it is smaller than the sum of its proper divisors (222025456410).

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

221440400022 is a wasteful number, since it uses less digits than its factorization.

221440400022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48754703.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 221440400022 its reverse (220004044122), we get a palindrome (441444444144).

The spelling of 221440400022 in words is "two hundred twenty-one billion, four hundred forty million, four hundred thousand, twenty-two".