221020221221148 has 12 divisors (see below), whose sum is σ = 515713849516040. Its totient is φ = 73673407073712.

The previous prime is 221020221221147. The next prime is 221020221221167. The reversal of 221020221221148 is 841122122020122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020221221147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9209175884203 + ... + 9209175884226.

Almost surely, 2^{221020221221148} is an apocalyptic number.

It is an amenable number.

221020221221148 is an abundant number, since it is smaller than the sum of its proper divisors (294693628294892).

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

221020221221148 is a wasteful number, since it uses less digits than its factorization.

221020221221148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18418351768436 (or 18418351768434 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The spelling of 221020221221148 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred forty-eight".