2132121165 has 16 divisors (see below), whose sum is σ = 3413779776. Its totient is φ = 1136336000.

The previous prime is 2132121149. The next prime is 2132121191. The reversal of 2132121165 is 5611212312.

It is a happy number.

It is not a de Polignac number, because 2132121165 - 2⁴ = 2132121149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27216 + ... + 70745.

It is an arithmetic number, because the mean of its divisors is an integer number (213361236).

Almost surely, 2^2132121165 is an apocalyptic number.

It is an amenable number.

2132121165 is a deficient number, since it is larger than the sum of its proper divisors (1281658611).

2132121165 is a wasteful number, since it uses less digits than its factorization.

2132121165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99420.

The product of its digits is 720, while the sum is 24.

The square root of 2132121165 is about 46174.8975635031. The cubic root of 2132121165 is about 1287.0753133510.

Adding to 2132121165 its reverse (5611212312), we get a palindrome (7743333477).

It can be divided in two parts, 21321 and 21165, that added together give a triangular number (42486 = T₂₉₁).

The spelling of 2132121165 in words is "two billion, one hundred thirty-two million, one hundred twenty-one thousand, one hundred sixty-five".