155204522125121 has 16 divisors (see below), whose sum is σ = 177731479373184. Its totient is φ = 132766426370304.

The previous prime is 155204522125109. The next prime is 155204522125171. The reversal of 155204522125121 is 121521225402551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155204522125121 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 (155204522125171) 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, 7363271 + ... + 19095203.

It is an arithmetic number, because the mean of its divisors is an integer number (11108217460824).

Almost surely, 2^{155204522125121} is an apocalyptic number.

It is an amenable number.

155204522125121 is a deficient number, since it is larger than the sum of its proper divisors (22526957248063).

155204522125121 is a wasteful number, since it uses less digits than its factorization.

155204522125121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11735720.

The product of its (nonzero) digits is 80000, while the sum is 38.

Adding to 155204522125121 its reverse (121521225402551), we get a palindrome (276725747527672).

The spelling of 155204522125121 in words is "one hundred fifty-five trillion, two hundred four billion, five hundred twenty-two million, one hundred twenty-five thousand, one hundred twenty-one".