2121532673 has 16 divisors (see below), whose sum is σ = 2389201920. Its totient is φ = 1869155904.

The previous prime is 2121532661. The next prime is 2121532711. The reversal of 2121532673 is 3762351212.

It is not a de Polignac number, because 2121532673 - 2⁸ = 2121532417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121531673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135815 + ... + 150627.

It is an arithmetic number, because the mean of its divisors is an integer number (149325120).

Almost surely, 2^2121532673 is an apocalyptic number.

2121532673 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2121532673 is a deficient number, since it is larger than the sum of its proper divisors (267669247).

2121532673 is a wasteful number, since it uses less digits than its factorization.

2121532673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15328.

The product of its digits is 15120, while the sum is 32.

The square root of 2121532673 is about 46060.0984909933. The cubic root of 2121532673 is about 1284.9411617949.

Adding to 2121532673 its reverse (3762351212), we get a palindrome (5883883885).

The spelling of 2121532673 in words is "two billion, one hundred twenty-one million, five hundred thirty-two thousand, six hundred seventy-three".