221421203616055 has 16 divisors (see below), whose sum is σ = 274868292996000. Its totient is φ = 171028423431040.

The previous prime is 221421203615999. The next prime is 221421203616061. The reversal of 221421203616055 is 550616302124122.

It is not a de Polignac number, because 221421203616055 - 2⁹ = 221421203615543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221421203615999 and 221421203616017.

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, 79768896 + ... + 82497994.

It is an arithmetic number, because the mean of its divisors is an integer number (17179268312250).

Almost surely, 2^{221421203616055} is an apocalyptic number.

221421203616055 is a deficient number, since it is larger than the sum of its proper divisors (53447089379945).

221421203616055 is a wasteful number, since it uses less digits than its factorization.

221421203616055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288674.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 221421203616055 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred three million, six hundred sixteen thousand, fifty-five".