121131232011001 has 16 divisors (see below), whose sum is σ = 128100926304000. Its totient is φ = 114221232224208.

The previous prime is 121131232010981. The next prime is 121131232011029. The reversal of 121131232011001 is 100110232131121.

It is a cyclic number.

It is not a de Polignac number, because 121131232011001 - 2¹⁵ = 121131231978233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 121131232011001.

It is not an unprimeable number, because it can be changed into a prime (121138232011001) 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, 13340350 + ... + 20499448.

It is an arithmetic number, because the mean of its divisors is an integer number (8006307894000).

Almost surely, 2^{121131232011001} is an apocalyptic number.

It is an amenable number.

121131232011001 is a deficient number, since it is larger than the sum of its proper divisors (6969694292999).

121131232011001 is a wasteful number, since it uses less digits than its factorization.

121131232011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7163268.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 121131232011001 its reverse (100110232131121), we get a palindrome (221241464142122).

The spelling of 121131232011001 in words is "one hundred twenty-one trillion, one hundred thirty-one billion, two hundred thirty-two million, eleven thousand, one".