111211101101121 has 16 divisors (see below), whose sum is σ = 169465476624384. Its totient is φ = 63548847524304.

The previous prime is 111211101101081. The next prime is 111211101101147. The reversal of 111211101101121 is 121101101112111.

It is a happy number.

It is not a de Polignac number, because 111211101101121 - 2¹³ = 111211101092929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111211101101121.

It is not an unprimeable number, because it can be changed into a prime (111211101102121) 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, 10819335 + ... + 18424988.

It is an arithmetic number, because the mean of its divisors is an integer number (10591592289024).

Almost surely, 2^{111211101101121} is an apocalyptic number.

It is an amenable number.

111211101101121 is a deficient number, since it is larger than the sum of its proper divisors (58254375523263).

111211101101121 is a wasteful number, since it uses less digits than its factorization.

111211101101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29425420.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 111211101101121 its reverse (121101101112111), we get a palindrome (232312202213232).

The spelling of 111211101101121 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred one million, one hundred one thousand, one hundred twenty-one".