2121433240 has 16 divisors (see below), whose sum is σ = 4773224880. Its totient is φ = 848573280.

The previous prime is 2121433229. The next prime is 2121433291. The reversal of 2121433240 is 423341212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26517876 + ... + 26517955.

It is an arithmetic number, because the mean of its divisors is an integer number (298326555).

Almost surely, 2^2121433240 is an apocalyptic number.

2121433240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121433240 is an abundant number, since it is smaller than the sum of its proper divisors (2651791640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121433240 is a wasteful number, since it uses less digits than its factorization.

2121433240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53035842 (or 53035838 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2121433240 is about 46059.0190950698. The cubic root of 2121433240 is about 1284.9210870706.

Adding to 2121433240 its reverse (423341212), we get a palindrome (2544774452).

The spelling of 2121433240 in words is "two billion, one hundred twenty-one million, four hundred thirty-three thousand, two hundred forty".