111101212221101 has 16 divisors (see below), whose sum is σ = 112741181562240. Its totient is φ = 109463355536640.

The previous prime is 111101212221053. The next prime is 111101212221133. The reversal of 111101212221101 is 101122212101111.

It is a cyclic number.

It is not a de Polignac number, because 111101212221101 - 2³⁰ = 111100138479277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111101212221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101212221301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649807841 + ... + 649978793.

It is an arithmetic number, because the mean of its divisors is an integer number (7046323847640).

Almost surely, 2^{111101212221101} is an apocalyptic number.

It is an amenable number.

111101212221101 is a deficient number, since it is larger than the sum of its proper divisors (1639969341139).

111101212221101 is a wasteful number, since it uses less digits than its factorization.

111101212221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177076.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111101212221101 its reverse (101122212101111), we get a palindrome (212223424322212).

The spelling of 111101212221101 in words is "one hundred eleven trillion, one hundred one billion, two hundred twelve million, two hundred twenty-one thousand, one hundred one".