121240312 has 16 divisors (see below), whose sum is σ = 227494800. Its totient is φ = 60575040.

The previous prime is 121240289. The next prime is 121240351. The reversal of 121240312 is 213042121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7612 + ... + 17332.

It is an arithmetic number, because the mean of its divisors is an integer number (14218425).

Almost surely, 2^121240312 is an apocalyptic number.

It is an amenable number.

121240312 is a deficient number, since it is larger than the sum of its proper divisors (106254488).

121240312 is a wasteful number, since it uses less digits than its factorization.

121240312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11286 (or 11282 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 121240312 is about 11010.9178545660. The cubic root of 121240312 is about 494.9359669577.

Adding to 121240312 its reverse (213042121), we get a palindrome (334282433).

The spelling of 121240312 in words is "one hundred twenty-one million, two hundred forty thousand, three hundred twelve".