121101101111001 has 32 divisors (see below), whose sum is σ = 178452971550720. Its totient is φ = 72434602468800.

The previous prime is 121101101110987. The next prime is 121101101111069. The reversal of 121101101111001 is 100111101101121.

It is not a de Polignac number, because 121101101111001 - 2¹³ = 121101101102809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121101101121001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3818475 + ... + 16024448.

It is an arithmetic number, because the mean of its divisors is an integer number (5576655360960).

Almost surely, 2^{121101101111001} is an apocalyptic number.

121101101111001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121101101111001 is a deficient number, since it is larger than the sum of its proper divisors (57351870439719).

121101101111001 is a wasteful number, since it uses less digits than its factorization.

121101101111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19845357.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 121101101111001 its reverse (100111101101121), we get a palindrome (221212202212122).

The spelling of 121101101111001 in words is "one hundred twenty-one trillion, one hundred one billion, one hundred one million, one hundred eleven thousand, one".