4155441020121 has 32 divisors (see below), whose sum is σ = 5638491640960. Its totient is φ = 2721572130816.

The previous prime is 4155441020117. The next prime is 4155441020179. The reversal of 4155441020121 is 1210201445514.

It is not a de Polignac number, because 4155441020121 - 2² = 4155441020117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4155431020121) 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, 196287825 + ... + 196308993.

It is an arithmetic number, because the mean of its divisors is an integer number (176202863780).

Almost surely, 2^{4155441020121} is an apocalyptic number.

It is an amenable number.

4155441020121 is a deficient number, since it is larger than the sum of its proper divisors (1483050620839).

4155441020121 is a wasteful number, since it uses less digits than its factorization.

4155441020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23833.

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 4155441020121 its reverse (1210201445514), we get a palindrome (5365642465635).

It can be divided in two parts, 415544 and 1020121, that added together give a triangular number (1435665 = T₁₆₉₄).

The spelling of 4155441020121 in words is "four trillion, one hundred fifty-five billion, four hundred forty-one million, twenty thousand, one hundred twenty-one".