2121133430 has 16 divisors (see below), whose sum is σ = 4111735824. Its totient is φ = 783187680.

The previous prime is 2121133403. The next prime is 2121133433. The reversal of 2121133430 is 343311212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121133433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8158076 + ... + 8158335.

It is an arithmetic number, because the mean of its divisors is an integer number (256983489).

Almost surely, 2^2121133430 is an apocalyptic number.

2121133430 is a deficient number, since it is larger than the sum of its proper divisors (1990602394).

2121133430 is a wasteful number, since it uses less digits than its factorization.

2121133430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16316431.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2121133430 is about 46055.7643514902. The cubic root of 2121133430 is about 1284.8605540415.

Adding to 2121133430 its reverse (343311212), we get a palindrome (2464444642).

The spelling of 2121133430 in words is "two billion, one hundred twenty-one million, one hundred thirty-three thousand, four hundred thirty".