121748655625 has 45 divisors (see below), whose sum is σ = 161809876921. Its totient is φ = 91557920000.

The previous prime is 121748655599. The next prime is 121748655641. The reversal of 121748655625 is 526556847121.

The square root of 121748655625 is 348925.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 22 ways, for example, as 115744885369 + 6003770256 = 340213^2 + 77484^2 .

It is not a de Polignac number, because 121748655625 - 2⁵ = 121748655593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 148292715 + ... + 148293535.

Almost surely, 2^121748655625 is an apocalyptic number.

121748655625 is the 348925-th square number.

121748655625 is the 174463-rd centered octagonal number.

It is an amenable number.

121748655625 is a deficient number, since it is larger than the sum of its proper divisors (40061221296).

121748655625 is an frugal number, since it uses more digits than its factorization.

121748655625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696 (or 843 counting only the distinct ones).

The product of its digits is 4032000, while the sum is 52.

The spelling of 121748655625 in words is "one hundred twenty-one billion, seven hundred forty-eight million, six hundred fifty-five thousand, six hundred twenty-five".