8121368387161 has 4 divisors (see below), whose sum is σ = 8179795498000. Its totient is φ = 8062941276324.

The previous prime is 8121368387159. The next prime is 8121368387201. The reversal of 8121368387161 is 1617838631218.

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 8121368387161 - 2¹ = 8121368387159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8121368387261) 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, 29213555211 + ... + 29213555488.

It is an arithmetic number, because the mean of its divisors is an integer number (2044948874500).

Almost surely, 2^{8121368387161} is an apocalyptic number.

It is an amenable number.

8121368387161 is a deficient number, since it is larger than the sum of its proper divisors (58427110839).

8121368387161 is a wasteful number, since it uses less digits than its factorization.

8121368387161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58427110838.

The product of its digits is 2322432, while the sum is 55.

The spelling of 8121368387161 in words is "eight trillion, one hundred twenty-one billion, three hundred sixty-eight million, three hundred eighty-seven thousand, one hundred sixty-one".