2142433121 has 4 divisors (see below), whose sum is σ = 2144008644. Its totient is φ = 2140857600.

The previous prime is 2142433099. The next prime is 2142433123. The reversal of 2142433121 is 1213342412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 156750400 + 1985682721 = 12520^2 + 44561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142433121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142433123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785720 + ... + 788441.

It is an arithmetic number, because the mean of its divisors is an integer number (536002161).

Almost surely, 2^2142433121 is an apocalyptic number.

It is an amenable number.

2142433121 is a deficient number, since it is larger than the sum of its proper divisors (1575523).

2142433121 is a wasteful number, since it uses less digits than its factorization.

2142433121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575522.

The product of its digits is 1152, while the sum is 23.

The square root of 2142433121 is about 46286.4248025271. The cubic root of 2142433121 is about 1289.1469473843.

Adding to 2142433121 its reverse (1213342412), we get a palindrome (3355775533).

It can be divided in two parts, 21424 and 33121, that added together give a palindrome (54545).

The spelling of 2142433121 in words is "two billion, one hundred forty-two million, four hundred thirty-three thousand, one hundred twenty-one".