221421255544706 has 32 divisors (see below), whose sum is σ = 380984666849280. Its totient is φ = 94543489558800.

The previous prime is 221421255544681. The next prime is 221421255544717. The reversal of 221421255544706 is 607445552124122.

It is a happy 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, 351886475 + ... + 352515153.

It is an arithmetic number, because the mean of its divisors is an integer number (11905770839040).

Almost surely, 2^{221421255544706} is an apocalyptic number.

221421255544706 is a deficient number, since it is larger than the sum of its proper divisors (159563411304574).

221421255544706 is a wasteful number, since it uses less digits than its factorization.

221421255544706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721790.

The product of its (nonzero) digits is 5376000, while the sum is 50.

The spelling of 221421255544706 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-five million, five hundred forty-four thousand, seven hundred six".