2121433121 has 2 divisors, whose sum is σ = 2121433122. Its totient is φ = 2121433120.

The previous prime is 2121433117. The next prime is 2121433133. The reversal of 2121433121 is 1213341212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1433682496 + 687750625 = 37864^2 + 26225^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121433121 - 2² = 2121433117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121433093 and 2121433102.

It is not a weakly prime, because it can be changed into another prime (2121430121) 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 as a sum of consecutive naturals, namely, 1060716560 + 1060716561.

It is an arithmetic number, because the mean of its divisors is an integer number (1060716561).

Almost surely, 2^2121433121 is an apocalyptic number.

It is an amenable number.

2121433121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121433121 is an equidigital number, since it uses as much as digits as its factorization.

2121433121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 2121433121 is about 46059.0178032489. The cubic root of 2121433121 is about 1284.9210630451.

Adding to 2121433121 its reverse (1213341212), we get a palindrome (3334774333).

The spelling of 2121433121 in words is "two billion, one hundred twenty-one million, four hundred thirty-three thousand, one hundred twenty-one".