221222004420 has 48 divisors (see below), whose sum is σ = 640780983360. Its totient is φ = 56958308736.

The previous prime is 221222004413. The next prime is 221222004431. The reversal of 221222004420 is 24400222122.

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, 63567802 + ... + 63571281.

It is an arithmetic number, because the mean of its divisors is an integer number (13349603820).

Almost surely, 2^221222004420 is an apocalyptic number.

221222004420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222004420 is an abundant number, since it is smaller than the sum of its proper divisors (419558978940).

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

221222004420 is a wasteful number, since it uses less digits than its factorization.

221222004420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127139124 (or 127139122 counting only the distinct ones).

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

Adding to 221222004420 its reverse (24400222122), we get a palindrome (245622226542).

The spelling of 221222004420 in words is "two hundred twenty-one billion, two hundred twenty-two million, four thousand, four hundred twenty".