121256074347898 has 24 divisors (see below), whose sum is σ = 214257697905600. Its totient is φ = 51309080281368.

The previous prime is 121256074347893. The next prime is 121256074347901. The reversal of 121256074347898 is 898743470652121.

It is not an unprimeable number, because it can be changed into a prime (121256074347893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7831048468 + ... + 7831063951.

It is an arithmetic number, because the mean of its divisors is an integer number (8927404079400).

It is a 1-persistent number, because it is pandigital, but 2⋅121256074347898 = 242512148695796 is not.

Almost surely, 2^{121256074347898} is an apocalyptic number.

121256074347898 is a deficient number, since it is larger than the sum of its proper divisors (93001623557702).

121256074347898 is a wasteful number, since it uses less digits than its factorization.

121256074347898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15662112514 (or 15662112507 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 67.

The spelling of 121256074347898 in words is "one hundred twenty-one trillion, two hundred fifty-six billion, seventy-four million, three hundred forty-seven thousand, eight hundred ninety-eight".