221201111011101 has 8 divisors (see below), whose sum is σ = 317622108118560. Its totient is φ = 136123760622192.

The previous prime is 221201111011099. The next prime is 221201111011171. The reversal of 221201111011101 is 101110111102122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221201111011101 - 2¹ = 221201111011099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201111011171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2835911679591 + ... + 2835911679668.

It is an arithmetic number, because the mean of its divisors is an integer number (39702763514820).

Almost surely, 2^{221201111011101} is an apocalyptic number.

It is an amenable number.

221201111011101 is a deficient number, since it is larger than the sum of its proper divisors (96420997107459).

221201111011101 is a wasteful number, since it uses less digits than its factorization.

221201111011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5671823359275.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 221201111011101 its reverse (101110111102122), we get a palindrome (322311222113223).

The spelling of 221201111011101 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred eleven million, eleven thousand, one hundred one".