201111221121 has 8 divisors (see below), whose sum is σ = 268301792544. Its totient is φ = 133997398560.

The previous prime is 201111221107. The next prime is 201111221137. The reversal of 201111221121 is 121122111102.

It is a happy number.

201111221121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 201111221121 - 2⁵ = 201111221089 is a prime.

It is a super-3 number, since 3×201111221121³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201111221121.

It is not an unprimeable number, because it can be changed into a prime (201111221821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19181100 + ... + 19191581.

It is an arithmetic number, because the mean of its divisors is an integer number (33537724068).

Almost surely, 2^201111221121 is an apocalyptic number.

It is an amenable number.

201111221121 is a deficient number, since it is larger than the sum of its proper divisors (67190571423).

201111221121 is a wasteful number, since it uses less digits than its factorization.

201111221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38374431.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201111221121 its reverse (121122111102), we get a palindrome (322233332223).

The spelling of 201111221121 in words is "two hundred one billion, one hundred eleven million, two hundred twenty-one thousand, one hundred twenty-one".