121605409448 has 8 divisors (see below), whose sum is σ = 228010142730. Its totient is φ = 60802704720.

The previous prime is 121605409447. The next prime is 121605409489. The reversal of 121605409448 is 844904506121.

It can be written as a sum of positive squares in only one way, i.e., 90951702724 + 30653706724 = 301582^2 + 175082^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×121605409448³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121605409399 and 121605409408.

It is not an unprimeable number, because it can be changed into a prime (121605409441) 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 as a sum of consecutive naturals, namely, 7600338083 + ... + 7600338098.

Almost surely, 2^121605409448 is an apocalyptic number.

It is an amenable number.

121605409448 is a deficient number, since it is larger than the sum of its proper divisors (106404733282).

121605409448 is a wasteful number, since it uses less digits than its factorization.

121605409448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15200676187 (or 15200676183 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 121605409448 in words is "one hundred twenty-one billion, six hundred five million, four hundred nine thousand, four hundred forty-eight".