2121430425 has 24 divisors (see below), whose sum is σ = 3713753376. Its totient is φ = 1064874240.

The previous prime is 2121430411. The next prime is 2121430439. The reversal of 2121430425 is 5240341212.

It is an interprime number because it is at equal distance from previous prime (2121430411) and next prime (2121430439).

It is not a de Polignac number, because 2121430425 - 2¹¹ = 2121428377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121430395 and 2121430404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 830659 + ... + 833208.

It is an arithmetic number, because the mean of its divisors is an integer number (154739724).

Almost surely, 2^2121430425 is an apocalyptic number.

2121430425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2121430425 is a deficient number, since it is larger than the sum of its proper divisors (1592322951).

2121430425 is a wasteful number, since it uses less digits than its factorization.

2121430425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663897 (or 1663892 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2121430425 is about 46058.9885364410. The cubic root of 2121430425 is about 1284.9205187356.

Adding to 2121430425 its reverse (5240341212), we get a palindrome (7361771637).

The spelling of 2121430425 in words is "two billion, one hundred twenty-one million, four hundred thirty thousand, four hundred twenty-five".