12155033055121 has 32 divisors (see below), whose sum is σ = 13503833481600. Its totient is φ = 10848593702400.

The previous prime is 12155033055049. The next prime is 12155033055133.

It is a happy number.

12155033055121 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12155033055121 - 2¹⁹ = 12155032530833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12155033055161) 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, 350787405 + ... + 350822053.

It is an arithmetic number, because the mean of its divisors is an integer number (421994796300).

Almost surely, 2^{12155033055121} is an apocalyptic number.

12155033055121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12155033055121 is a deficient number, since it is larger than the sum of its proper divisors (1348800426479).

12155033055121 is a wasteful number, since it uses less digits than its factorization.

12155033055121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37137.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 12155033055121 in words is "twelve trillion, one hundred fifty-five billion, thirty-three million, fifty-five thousand, one hundred twenty-one".