121243430 has 64 divisors (see below), whose sum is σ = 274959360. Its totient is φ = 37392000.

The previous prime is 121243399. The next prime is 121243457. The reversal of 121243430 is 34342121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76991 + ... + 78549.

It is an arithmetic number, because the mean of its divisors is an integer number (4296240).

Almost surely, 2^121243430 is an apocalyptic number.

121243430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121243430 is an abundant number, since it is smaller than the sum of its proper divisors (153715930).

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

121243430 is a wasteful number, since it uses less digits than its factorization.

121243430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 121243430 is about 11011.0594403990. The cubic root of 121243430 is about 494.9402097630.

Adding to 121243430 its reverse (34342121), we get a palindrome (155585551).

The spelling of 121243430 in words is "one hundred twenty-one million, two hundred forty-three thousand, four hundred thirty".