12121875609154 has 4 divisors (see below), whose sum is σ = 18182813413734. Its totient is φ = 6060937804576.

The previous prime is 12121875609143. The next prime is 12121875609197. The reversal of 12121875609154 is 45190657812121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11914736843529 + 207138765625 = 3451773^2 + 455125^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3030468902287 + ... + 3030468902290.

Almost surely, 2^{12121875609154} is an apocalyptic number.

12121875609154 is a deficient number, since it is larger than the sum of its proper divisors (6060937804580).

12121875609154 is an equidigital number, since it uses as much as digits as its factorization.

12121875609154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060937804579.

The product of its (nonzero) digits is 1209600, while the sum is 52.

The spelling of 12121875609154 in words is "twelve trillion, one hundred twenty-one billion, eight hundred seventy-five million, six hundred nine thousand, one hundred fifty-four".