121111011101 has 16 divisors (see below), whose sum is σ = 123824246400. Its totient is φ = 118414191168.

The previous prime is 121111011089. The next prime is 121111011107. The reversal of 121111011101 is 101110111121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121111011101 - 2¹⁰ = 121111010077 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 (121111011107) 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, 40955915 + ... + 40958871.

It is an arithmetic number, because the mean of its divisors is an integer number (7739015400).

Almost surely, 2^121111011101 is an apocalyptic number.

It is an amenable number.

121111011101 is a deficient number, since it is larger than the sum of its proper divisors (2713235299).

121111011101 is a wasteful number, since it uses less digits than its factorization.

121111011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5428.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 121111011101 its reverse (101110111121), we get a palindrome (222221122222).

The spelling of 121111011101 in words is "one hundred twenty-one billion, one hundred eleven million, eleven thousand, one hundred one".