121115343511121 has 4 divisors (see below), whose sum is σ = 122226493451700. Its totient is φ = 120004193570544.

The previous prime is 121115343511087. The next prime is 121115343511133.

It is a happy number.

121115343511121 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108823202330896 + 12292141180225 = 10431836^2 + 3506015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121115343511121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121115343511171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555574970126 + ... + 555574970343.

It is an arithmetic number, because the mean of its divisors is an integer number (30556623362925).

Almost surely, 2^{121115343511121} is an apocalyptic number.

It is an amenable number.

121115343511121 is a deficient number, since it is larger than the sum of its proper divisors (1111149940579).

121115343511121 is a wasteful number, since it uses less digits than its factorization.

121115343511121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111149940578.

The product of its digits is 3600, while the sum is 32.

The spelling of 121115343511121 in words is "one hundred twenty-one trillion, one hundred fifteen billion, three hundred forty-three million, five hundred eleven thousand, one hundred twenty-one".