121502415243 has 64 divisors (see below), whose sum is σ = 182135568384. Its totient is φ = 71430528000.

The previous prime is 121502415241. The next prime is 121502415277. The reversal of 121502415243 is 342514205121.

It is not a de Polignac number, because 121502415243 - 2¹ = 121502415241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121502415243.

It is not an unprimeable number, because it can be changed into a prime (121502415241) by changing a digit.

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 in 63 ways as a sum of consecutive naturals, for example, 34802728 + ... + 34806218.

It is an arithmetic number, because the mean of its divisors is an integer number (2845868256).

Almost surely, 2^121502415243 is an apocalyptic number.

121502415243 is a deficient number, since it is larger than the sum of its proper divisors (60633153141).

121502415243 is a wasteful number, since it uses less digits than its factorization.

121502415243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3816.

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 121502415243 in words is "one hundred twenty-one billion, five hundred two million, four hundred fifteen thousand, two hundred forty-three".