2161613030123 has 4 divisors (see below), whose sum is σ = 2161621785288. Its totient is φ = 2161604274960.

The previous prime is 2161613030117. The next prime is 2161613030173. The reversal of 2161613030123 is 3210303161612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2161613030123 - 2¹⁶ = 2161612964587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161613030173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3996161 + ... + 4504722.

It is an arithmetic number, because the mean of its divisors is an integer number (540405446322).

Almost surely, 2^{2161613030123} is an apocalyptic number.

2161613030123 is a deficient number, since it is larger than the sum of its proper divisors (8755165).

2161613030123 is an equidigital number, since it uses as much as digits as its factorization.

2161613030123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755164.

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 2161613030123 its reverse (3210303161612), we get a palindrome (5371916191735).

The spelling of 2161613030123 in words is "two trillion, one hundred sixty-one billion, six hundred thirteen million, thirty thousand, one hundred twenty-three".