221000000111101 has 4 divisors (see below), whose sum is σ = 221001845018332. Its totient is φ = 220998155203872.

The previous prime is 221000000111083. The next prime is 221000000111147. The reversal of 221000000111101 is 101111000000122.

221000000111101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 154449467172900 + 66550532938201 = 12427770^2 + 8157851^2 .

It is a cyclic number.

It is not a de Polignac number, because 221000000111101 - 2³⁵ = 220965640372733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000000111701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922273920 + ... + 922513513.

It is an arithmetic number, because the mean of its divisors is an integer number (55250461254583).

Almost surely, 2^{221000000111101} is an apocalyptic number.

It is an amenable number.

221000000111101 is a deficient number, since it is larger than the sum of its proper divisors (1844907231).

221000000111101 is a wasteful number, since it uses less digits than its factorization.

221000000111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844907230.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 221000000111101 its reverse (101111000000122), we get a palindrome (322111000111223).

The spelling of 221000000111101 in words is "two hundred twenty-one trillion, one hundred eleven thousand, one hundred one".