2161177070123 has 2 divisors, whose sum is σ = 2161177070124. Its totient is φ = 2161177070122.

The previous prime is 2161177070093. The next prime is 2161177070141. The reversal of 2161177070123 is 3210707711612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2161177070123 - 2²⁰ = 2161176021547 is a prime.

It is a super-3 number, since 3×2161177070123³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2161177070183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080588535061 + 1080588535062.

It is an arithmetic number, because the mean of its divisors is an integer number (1080588535062).

Almost surely, 2^{2161177070123} is an apocalyptic number.

2161177070123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161177070123 is an equidigital number, since it uses as much as digits as its factorization.

2161177070123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 38.

The spelling of 2161177070123 in words is "two trillion, one hundred sixty-one billion, one hundred seventy-seven million, seventy thousand, one hundred twenty-three".