121444505444121 has 4 divisors (see below), whose sum is σ = 161926007258832. Its totient is φ = 80963003629412.

The previous prime is 121444505444111. The next prime is 121444505444173.

121444505444121 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121444505444121 - 2⁷ = 121444505443993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121444505444111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20240750907351 + ... + 20240750907356.

It is an arithmetic number, because the mean of its divisors is an integer number (40481501814708).

Almost surely, 2^{121444505444121} is an apocalyptic number.

It is an amenable number.

121444505444121 is a deficient number, since it is larger than the sum of its proper divisors (40481501814711).

121444505444121 is an equidigital number, since it uses as much as digits as its factorization.

121444505444121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40481501814710.

The product of its (nonzero) digits is 409600, while the sum is 42.

It can be divided in two parts, 12144450 and 5444121, that added together give a palindrome (17588571).

The spelling of 121444505444121 in words is "one hundred twenty-one trillion, four hundred forty-four billion, five hundred five million, four hundred forty-four thousand, one hundred twenty-one".