121261743425 has 6 divisors (see below), whose sum is σ = 150364561878. Its totient is φ = 97009394720.

The previous prime is 121261743397. The next prime is 121261743439. The reversal of 121261743425 is 524347162121.

It can be written as a sum of positive squares in 3 ways, for example, as 11928353089 + 109333390336 = 109217^2 + 330656^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121261743425 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2425234844 + ... + 2425234893.

It is an arithmetic number, because the mean of its divisors is an integer number (25060760313).

Almost surely, 2^121261743425 is an apocalyptic number.

It is an amenable number.

121261743425 is a deficient number, since it is larger than the sum of its proper divisors (29102818453).

121261743425 is an equidigital number, since it uses as much as digits as its factorization.

121261743425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4850469747 (or 4850469742 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The spelling of 121261743425 in words is "one hundred twenty-one billion, two hundred sixty-one million, seven hundred forty-three thousand, four hundred twenty-five".