121443012 has 36 divisors (see below), whose sum is σ = 307996416. Its totient is φ = 40347120.

The previous prime is 121443001. The next prime is 121443031. The reversal of 121443012 is 210344121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 5773 + ... + 16619.

It is an arithmetic number, because the mean of its divisors is an integer number (8555456).

Almost surely, 2^121443012 is an apocalyptic number.

121443012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121443012 is an abundant number, since it is smaller than the sum of its proper divisors (186553404).

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

121443012 is a wasteful number, since it uses less digits than its factorization.

121443012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11168 (or 11163 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121443012 is about 11020.1185111595. The cubic root of 121443012 is about 495.2116389155.

Adding to 121443012 its reverse (210344121), we get a palindrome (331787133).

The spelling of 121443012 in words is "one hundred twenty-one million, four hundred forty-three thousand, twelve".