221021221021112 has 8 divisors (see below), whose sum is σ = 414414789414600. Its totient is φ = 110510610510552.

The previous prime is 221021221021091. The next prime is 221021221021127. The reversal of 221021221021112 is 211120122120122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13813826313812 + ... + 13813826313827.

It is an arithmetic number, because the mean of its divisors is an integer number (51801848676825).

Almost surely, 2^{221021221021112} is an apocalyptic number.

It is an amenable number.

221021221021112 is a deficient number, since it is larger than the sum of its proper divisors (193393568393488).

221021221021112 is a wasteful number, since it uses less digits than its factorization.

221021221021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27627652627645 (or 27627652627641 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221021221021112 its reverse (211120122120122), we get a palindrome (432141343141234).

The spelling of 221021221021112 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty-one million, twenty-one thousand, one hundred twelve".