2551223055121 has 24 divisors (see below), whose sum is σ = 2889246983040. Its totient is φ = 2247452228736.

The previous prime is 2551223055097. The next prime is 2551223055163. The reversal of 2551223055121 is 1215503221552.

It is a de Polignac number, because none of the positive numbers 2^k-2551223055121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551223052121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 958845 + ... + 2453941.

It is an arithmetic number, because the mean of its divisors is an integer number (120385290960).

Almost surely, 2^{2551223055121} is an apocalyptic number.

It is an amenable number.

2551223055121 is a deficient number, since it is larger than the sum of its proper divisors (338023927919).

2551223055121 is a wasteful number, since it uses less digits than its factorization.

2551223055121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495585 (or 1495572 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 34.

Adding to 2551223055121 its reverse (1215503221552), we get a palindrome (3766726276673).

The spelling of 2551223055121 in words is "two trillion, five hundred fifty-one billion, two hundred twenty-three million, fifty-five thousand, one hundred twenty-one".