121221430 has 24 divisors (see below), whose sum is σ = 239840496. Its totient is φ = 44080080.

The previous prime is 121221403. The next prime is 121221449. The reversal of 121221430 is 34122121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48882 + ... + 51301.

It is an arithmetic number, because the mean of its divisors is an integer number (9993354).

Almost surely, 2^121221430 is an apocalyptic number.

121221430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221430 is a deficient number, since it is larger than the sum of its proper divisors (118619066).

121221430 is a wasteful number, since it uses less digits than its factorization.

121221430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100212 (or 100201 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 121221430 is about 11010.0603994710. The cubic root of 121221430 is about 494.9102718019.

Adding to 121221430 its reverse (34122121), we get a palindrome (155343551).

The spelling of 121221430 in words is "one hundred twenty-one million, two hundred twenty-one thousand, four hundred thirty".