12121875609155 has 32 divisors (see below), whose sum is σ = 15962026691520. Its totient is φ = 8781946467840.

The previous prime is 12121875609143. The next prime is 12121875609197. The reversal of 12121875609155 is 55190657812121.

It is not a de Polignac number, because 12121875609155 - 2⁴ = 12121875609139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a junction number, because it is equal to n+sod(n) for n = 12121875609097 and 12121875609106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45544565 + ... + 45809945.

It is an arithmetic number, because the mean of its divisors is an integer number (498813334110).

Almost surely, 2^{12121875609155} is an apocalyptic number.

12121875609155 is a deficient number, since it is larger than the sum of its proper divisors (3840151082365).

12121875609155 is a wasteful number, since it uses less digits than its factorization.

12121875609155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278711.

The product of its (nonzero) digits is 1512000, while the sum is 53.

The spelling of 12121875609155 in words is "twelve trillion, one hundred twenty-one billion, eight hundred seventy-five million, six hundred nine thousand, one hundred fifty-five".