121321340 has 24 divisors (see below), whose sum is σ = 291171552. Its totient is φ = 41595840.

The previous prime is 121321339. The next prime is 121321351. The reversal of 121321340 is 43123121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433151 + ... + 433430.

It is an arithmetic number, because the mean of its divisors is an integer number (12132148).

Almost surely, 2^121321340 is an apocalyptic number.

121321340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121321340 is an abundant number, since it is smaller than the sum of its proper divisors (169850212).

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

121321340 is a wasteful number, since it uses less digits than its factorization.

121321340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866597 (or 866595 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 121321340 is about 11014.5966789529. The cubic root of 121321340 is about 495.0462018570.

Adding to 121321340 its reverse (43123121), we get a palindrome (164444461).

The spelling of 121321340 in words is "one hundred twenty-one million, three hundred twenty-one thousand, three hundred forty".