121266519825 has 24 divisors (see below), whose sum is σ = 218720706336. Its totient is φ = 58795888000.

The previous prime is 121266519821. The next prime is 121266519893. The reversal of 121266519825 is 528915662121.

It is not a de Polignac number, because 121266519825 - 2² = 121266519821 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121266519821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73494036 + ... + 73495685.

It is an arithmetic number, because the mean of its divisors is an integer number (9113362764).

Almost surely, 2^121266519825 is an apocalyptic number.

121266519825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121266519825 is a deficient number, since it is larger than the sum of its proper divisors (97454186511).

121266519825 is a wasteful number, since it uses less digits than its factorization.

121266519825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146989745 (or 146989740 counting only the distinct ones).

The product of its digits is 518400, while the sum is 48.

The spelling of 121266519825 in words is "one hundred twenty-one billion, two hundred sixty-six million, five hundred nineteen thousand, eight hundred twenty-five".