121712340 has 48 divisors (see below), whose sum is σ = 342054720. Its totient is φ = 32336640.

The previous prime is 121712329. The next prime is 121712359. The reversal of 121712340 is 43217121.

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 15 ways as a sum of consecutive naturals, for example, 13251 + ... + 20469.

It is an arithmetic number, because the mean of its divisors is an integer number (7126140).

Almost surely, 2^121712340 is an apocalyptic number.

121712340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121712340 is an abundant number, since it is smaller than the sum of its proper divisors (220342380).

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

121712340 is a wasteful number, since it uses less digits than its factorization.

121712340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7512 (or 7510 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 121712340 is about 11032.3315758728. The cubic root of 121712340 is about 495.5774507840.

Adding to 121712340 its reverse (43217121), we get a palindrome (164929461).

The spelling of 121712340 in words is "one hundred twenty-one million, seven hundred twelve thousand, three hundred forty".