121335438725 has 6 divisors (see below), whose sum is σ = 150455944050. Its totient is φ = 97068350960.

The previous prime is 121335438689. The next prime is 121335438739. The reversal of 121335438725 is 527834533121.

It can be written as a sum of positive squares in 3 ways, for example, as 18162144289 + 103173294436 = 134767^2 + 321206^2 .

It is not a de Polignac number, because 121335438725 - 2¹⁶ = 121335373189 is a prime.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2426708750 + ... + 2426708799.

It is an arithmetic number, because the mean of its divisors is an integer number (25075990675).

Almost surely, 2^121335438725 is an apocalyptic number.

It is an amenable number.

121335438725 is a deficient number, since it is larger than the sum of its proper divisors (29120505325).

121335438725 is an equidigital number, since it uses as much as digits as its factorization.

121335438725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4853417559 (or 4853417554 counting only the distinct ones).

The product of its digits is 604800, while the sum is 44.

The spelling of 121335438725 in words is "one hundred twenty-one billion, three hundred thirty-five million, four hundred thirty-eight thousand, seven hundred twenty-five".