2121230430 has 240 divisors, whose sum is σ = 6548949792. Its totient is φ = 491356800.

The previous prime is 2121230429. The next prime is 2121230431. The reversal of 2121230430 is 340321212.

2121230430 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 230 + 430 = 666.

It is an interprime number because it is at equal distance from previous prime (2121230429) and next prime (2121230431).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121230431) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2253760 + ... + 2254700.

Almost surely, 2^2121230430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121230430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3274474896).

2121230430 is an abundant number, since it is smaller than the sum of its proper divisors (4427719362).

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

2121230430 is a wasteful number, since it uses less digits than its factorization.

2121230430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2121230430 is about 46056.8174106722. The cubic root of 2121230430 is about 1284.8801394154.

Adding to 2121230430 its reverse (340321212), we get a palindrome (2461551642).

The spelling of 2121230430 in words is "two billion, one hundred twenty-one million, two hundred thirty thousand, four hundred thirty".