121101001101 has 16 divisors (see below), whose sum is σ = 180509565120. Its totient is φ = 80238697200.

The previous prime is 121101001061. The next prime is 121101001127. The reversal of 121101001101 is 101100101121.

It is not a de Polignac number, because 121101001101 - 2¹¹ = 121100999053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101001171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13753950 + ... + 13762751.

It is an arithmetic number, because the mean of its divisors is an integer number (11281847820).

Almost surely, 2^121101001101 is an apocalyptic number.

It is an amenable number.

121101001101 is a deficient number, since it is larger than the sum of its proper divisors (59408564019).

121101001101 is a wasteful number, since it uses less digits than its factorization.

121101001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27516873 (or 27516867 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 121101001101 its reverse (101100101121), we get a palindrome (222201102222).

The spelling of 121101001101 in words is "one hundred twenty-one billion, one hundred one million, one thousand, one hundred one".