121089705825 has 24 divisors (see below), whose sum is σ = 218401798176. Its totient is φ = 58710160000.

The previous prime is 121089705811. The next prime is 121089705827. The reversal of 121089705825 is 528507980121.

It is not a de Polignac number, because 121089705825 - 2²¹ = 121087608673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121089705827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73386876 + ... + 73388525.

It is an arithmetic number, because the mean of its divisors is an integer number (9100074924).

Almost surely, 2^121089705825 is an apocalyptic number.

121089705825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121089705825 is a deficient number, since it is larger than the sum of its proper divisors (97312092351).

121089705825 is a wasteful number, since it uses less digits than its factorization.

121089705825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146775425 (or 146775420 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 121089705825 in words is "one hundred twenty-one billion, eighty-nine million, seven hundred five thousand, eight hundred twenty-five".