121440012 has 24 divisors (see below), whose sum is σ = 283950912. Its totient is φ = 40395600.

The previous prime is 121439999. The next prime is 121440029. The reversal of 121440012 is 210044121.

It is a junction number, because it is equal to n+sod(n) for n = 121439973 and 121440000.

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 7 ways as a sum of consecutive naturals, for example, 4414 + ... + 16197.

It is an arithmetic number, because the mean of its divisors is an integer number (11831288).

Almost surely, 2^121440012 is an apocalyptic number.

121440012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121440012 is an abundant number, since it is smaller than the sum of its proper divisors (162510900).

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

121440012 is a wasteful number, since it uses less digits than its factorization.

121440012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21109 (or 21107 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 121440012 is about 11019.9823956302. The cubic root of 121440012 is about 495.2075611534.

Adding to 121440012 its reverse (210044121), we get a palindrome (331484133).

The spelling of 121440012 in words is "one hundred twenty-one million, four hundred forty thousand, twelve".