221221202101101 has 24 divisors (see below), whose sum is σ = 322015764994560. Its totient is φ = 146342793168000.

The previous prime is 221221202101093. The next prime is 221221202101129. The reversal of 221221202101101 is 101101202122122.

221221202101101 is a `hidden beast` number, since 221 + 2 + 2 + 120 + 210 + 110 + 1 = 666.

It is not a de Polignac number, because 221221202101101 - 2³ = 221221202101093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221202101901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159774271 + ... + 161152908.

It is an arithmetic number, because the mean of its divisors is an integer number (13417323541440).

Almost surely, 2^{221221202101101} is an apocalyptic number.

It is an amenable number.

221221202101101 is a deficient number, since it is larger than the sum of its proper divisors (100794562893459).

221221202101101 is a wasteful number, since it uses less digits than its factorization.

221221202101101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320927777 (or 320927774 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221221202101101 its reverse (101101202122122), we get a palindrome (322322404223223).

The spelling of 221221202101101 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred two million, one hundred one thousand, one hundred one".