121947312 has 40 divisors (see below), whose sum is σ = 322362304. Its totient is φ = 39703104.

The previous prime is 121947289. The next prime is 121947313. The reversal of 121947312 is 213749121.

It is a super-2 number, since 2×121947312² = 29742293808050688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121947312.

It is not an unprimeable number, because it can be changed into a prime (121947313) 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, 27478 + ... + 31605.

Almost surely, 2^121947312 is an apocalyptic number.

121947312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121947312 is an abundant number, since it is smaller than the sum of its proper divisors (200414992).

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

121947312 is a wasteful number, since it uses less digits than its factorization.

121947312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59137 (or 59131 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 121947312 is about 11042.9756859281. The cubic root of 121947312 is about 495.8961584557.

The spelling of 121947312 in words is "one hundred twenty-one million, nine hundred forty-seven thousand, three hundred twelve".