221222104440 has 64 divisors (see below), whose sum is σ = 665338160160. Its totient is φ = 58843952640.

The previous prime is 221222104423. The next prime is 221222104457. The reversal of 221222104440 is 44401222122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221222104423) and next prime (221222104457).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 221222104440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2274171 + ... + 2369450.

Almost surely, 2^221222104440 is an apocalyptic number.

221222104440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222104440 is an abundant number, since it is smaller than the sum of its proper divisors (444116055720).

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

221222104440 is a wasteful number, since it uses less digits than its factorization.

221222104440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644032 (or 4644028 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 221222104440 its reverse (44401222122), we get a palindrome (265623326562).

The spelling of 221222104440 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred four thousand, four hundred forty".