121240430 has 32 divisors (see below), whose sum is σ = 231660000. Its totient is φ = 45527040.

The previous prime is 121240409. The next prime is 121240439. The reversal of 121240430 is 34042121.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 121240399 and 121240408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121240439) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 96446 + ... + 97694.

It is an arithmetic number, because the mean of its divisors is an integer number (7239375).

Almost surely, 2^121240430 is an apocalyptic number.

121240430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121240430 is a deficient number, since it is larger than the sum of its proper divisors (110419570).

121240430 is a wasteful number, since it uses less digits than its factorization.

121240430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 121240430 is about 11010.9232128827. The cubic root of 121240430 is about 494.9361275270.

Adding to 121240430 its reverse (34042121), we get a palindrome (155282551).

The spelling of 121240430 in words is "one hundred twenty-one million, two hundred forty thousand, four hundred thirty".