221112011001101 has 4 divisors (see below), whose sum is σ = 241213102910304. Its totient is φ = 201010919091900.

The previous prime is 221112011001097. The next prime is 221112011001143. The reversal of 221112011001101 is 101100110211122.

221112011001101 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221112011001101 - 2² = 221112011001097 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 (221112011001001) 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, 10050545954585 + ... + 10050545954606.

It is an arithmetic number, because the mean of its divisors is an integer number (60303275727576).

Almost surely, 2^{221112011001101} is an apocalyptic number.

It is an amenable number.

221112011001101 is a deficient number, since it is larger than the sum of its proper divisors (20101091909203).

221112011001101 is a wasteful number, since it uses less digits than its factorization.

221112011001101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20101091909202.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221112011001101 its reverse (101100110211122), we get a palindrome (322212121212223).

The spelling of 221112011001101 in words is "two hundred twenty-one trillion, one hundred twelve billion, eleven million, one thousand, one hundred one".