221220014440 has 32 divisors (see below), whose sum is σ = 514908657000. Its totient is φ = 85436694784.

The previous prime is 221220014437. The next prime is 221220014443. The reversal of 221220014440 is 44410022122.

It is an interprime number because it is at equal distance from previous prime (221220014437) and next prime (221220014443).

It can be written as a sum of positive squares in 4 ways, for example, as 165224364484 + 55995649956 = 406478^2 + 236634^2 .

It is not an unprimeable number, because it can be changed into a prime (221220014443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95352295 + ... + 95354614.

Almost surely, 2^221220014440 is an apocalyptic number.

221220014440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221220014440 is an abundant number, since it is smaller than the sum of its proper divisors (293688642560).

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

221220014440 is a wasteful number, since it uses less digits than its factorization.

221220014440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190706949 (or 190706945 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 221220014440 its reverse (44410022122), we get a palindrome (265630036562).

The spelling of 221220014440 in words is "two hundred twenty-one billion, two hundred twenty million, fourteen thousand, four hundred forty".