36155666121 has 4 divisors (see below), whose sum is σ = 48207554832. Its totient is φ = 24103777412.

The previous prime is 36155666117. The next prime is 36155666153. The reversal of 36155666121 is 12166655163.

36155666121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36155666121 - 2² = 36155666117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (36155666191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6025944351 + ... + 6025944356.

It is an arithmetic number, because the mean of its divisors is an integer number (12051888708).

Almost surely, 2^36155666121 is an apocalyptic number.

It is an amenable number.

36155666121 is a deficient number, since it is larger than the sum of its proper divisors (12051888711).

36155666121 is a wasteful number, since it uses less digits than its factorization.

36155666121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12051888710.

The product of its digits is 194400, while the sum is 42.

The spelling of 36155666121 in words is "thirty-six billion, one hundred fifty-five million, six hundred sixty-six thousand, one hundred twenty-one".