121543200355 has 16 divisors (see below), whose sum is σ = 153537864480. Its totient is φ = 92111185152.

The previous prime is 121543200299. The next prime is 121543200367. The reversal of 121543200355 is 553002345121.

It is a cyclic number.

It is not a de Polignac number, because 121543200355 - 2¹⁷ = 121543069283 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2064487 + ... + 2122543.

It is an arithmetic number, because the mean of its divisors is an integer number (9596116530).

Almost surely, 2^121543200355 is an apocalyptic number.

121543200355 is a deficient number, since it is larger than the sum of its proper divisors (31994664125).

121543200355 is a wasteful number, since it uses less digits than its factorization.

121543200355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80118.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 121543200355 its reverse (553002345121), we get a palindrome (674545545476).

The spelling of 121543200355 in words is "one hundred twenty-one billion, five hundred forty-three million, two hundred thousand, three hundred fifty-five".