121340020 has 24 divisors (see below), whose sum is σ = 261702504. Its totient is φ = 47223936.

The previous prime is 121340003. The next prime is 121340027. The reversal of 121340020 is 20043121.

It can be written as a sum of positive squares in 4 ways, for example, as 14961424 + 106378596 = 3868^2 + 10314^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121340027) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 81247 + ... + 82726.

It is an arithmetic number, because the mean of its divisors is an integer number (10904271).

Almost surely, 2^121340020 is an apocalyptic number.

121340020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121340020 is an abundant number, since it is smaller than the sum of its proper divisors (140362484).

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

121340020 is a wasteful number, since it uses less digits than its factorization.

121340020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164019 (or 164017 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 121340020 is about 11015.4446119982. Note that the first 3 decimals coincide. The cubic root of 121340020 is about 495.0716081828.

Adding to 121340020 its reverse (20043121), we get a palindrome (141383141).

The spelling of 121340020 in words is "one hundred twenty-one million, three hundred forty thousand, twenty".