12121430 has 32 divisors (see below), whose sum is σ = 23189760. Its totient is φ = 4548960.

The previous prime is 12121427. The next prime is 12121451. The reversal of 12121430 is 3412121.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24647 + ... + 25133.

It is an arithmetic number, because the mean of its divisors is an integer number (724680).

Almost surely, 2^12121430 is an apocalyptic number.

12121430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121430 is a deficient number, since it is larger than the sum of its proper divisors (11068330).

12121430 is a wasteful number, since it uses less digits than its factorization.

12121430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 12121430 is about 3481.5844094320. The cubic root of 12121430 is about 229.7124952051.

Adding to 12121430 its reverse (3412121), we get a palindrome (15533551).

The spelling of 12121430 in words is "twelve million, one hundred twenty-one thousand, four hundred thirty".