121355430 has 64 divisors (see below), whose sum is σ = 344355840. Its totient is φ = 26780544.

The previous prime is 121355411. The next prime is 121355431. The reversal of 121355430 is 34553121.

It is a self number, because there is not a number n which added to its sum of digits gives 121355430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121355431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3874 + ... + 16053.

It is an arithmetic number, because the mean of its divisors is an integer number (5380560).

Almost surely, 2^121355430 is an apocalyptic number.

121355430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121355430 is an abundant number, since it is smaller than the sum of its proper divisors (223000410).

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

121355430 is a wasteful number, since it uses less digits than its factorization.

121355430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19973.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 121355430 is about 11016.1440622388. The cubic root of 121355430 is about 495.0925650788.

The spelling of 121355430 in words is "one hundred twenty-one million, three hundred fifty-five thousand, four hundred thirty".