2161105023325 has 12 divisors (see below), whose sum is σ = 2679794329780. Its totient is φ = 1728868469760.

The previous prime is 2161105023307. The next prime is 2161105023367. The reversal of 2161105023325 is 5233205011612.

It can be written as a sum of positive squares in 6 ways, for example, as 24020660196 + 2137084363129 = 154986^2 + 1461877^2 .

It is not a de Polignac number, because 2161105023325 - 2¹⁵ = 2161104990557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3039421 + ... + 3682429.

Almost surely, 2^{2161105023325} is an apocalyptic number.

2161105023325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2161105023325 is a deficient number, since it is larger than the sum of its proper divisors (518689306455).

2161105023325 is a wasteful number, since it uses less digits than its factorization.

2161105023325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777456 (or 777451 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 2161105023325 in words is "two trillion, one hundred sixty-one billion, one hundred five million, twenty-three thousand, three hundred twenty-five".