121635565042145 has 32 divisors (see below), whose sum is σ = 182315819126016. Its totient is φ = 75684611001600.

The previous prime is 121635565042127. The next prime is 121635565042193. The reversal of 121635565042145 is 541240565536121.

It is not a de Polignac number, because 121635565042145 - 2⁴⁴ = 104043378997729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121635565042093 and 121635565042102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 291784814 + ... + 292201383.

It is an arithmetic number, because the mean of its divisors is an integer number (5697369347688).

Almost surely, 2^{121635565042145} is an apocalyptic number.

It is an amenable number.

121635565042145 is a deficient number, since it is larger than the sum of its proper divisors (60680254083871).

121635565042145 is a wasteful number, since it uses less digits than its factorization.

121635565042145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583986761.

The product of its (nonzero) digits is 4320000, while the sum is 50.

The spelling of 121635565042145 in words is "one hundred twenty-one trillion, six hundred thirty-five billion, five hundred sixty-five million, forty-two thousand, one hundred forty-five".