121340420 has 24 divisors (see below), whose sum is σ = 258406848. Its totient is φ = 47852000.

The previous prime is 121340413. The next prime is 121340423. The reversal of 121340420 is 24043121.

It is not an unprimeable number, because it can be changed into a prime (121340423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41306 + ... + 44145.

It is an arithmetic number, because the mean of its divisors is an integer number (10766952).

Almost surely, 2^121340420 is an apocalyptic number.

121340420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121340420 is an abundant number, since it is smaller than the sum of its proper divisors (137066428).

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

121340420 is a wasteful number, since it uses less digits than its factorization.

121340420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85531 (or 85529 counting only the distinct ones).

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

The square root of 121340420 is about 11015.4627683089. The cubic root of 121340420 is about 495.0721521869.

Adding to 121340420 its reverse (24043121), we get a palindrome (145383541).

The spelling of 121340420 in words is "one hundred twenty-one million, three hundred forty thousand, four hundred twenty".