121111012 has 12 divisors (see below), whose sum is σ = 231212016.
Its totient is φ = 55050440.
The previous prime is 121110991. The next prime is 121111021. The reversal of 121111012 is 210111121.
Adding to 121111012 its reverse (210111121), we get a palindrome (331222133).
It is a self number, because there is not a number n which added to its sum of digits gives 121111012.
It is an unprimeable number.
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 3 ways as a sum of consecutive naturals, for example, 1376218 + ... + 1376305.
It is an arithmetic number, because the mean of its divisors is an integer number (19267668).
Almost surely, 2121111012 is an apocalyptic number.
It is an amenable number.
121111012 is a deficient number, since it is larger than the sum of its proper divisors (110101004).
121111012 is a wasteful number, since it uses less digits than its factorization.
121111012 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2752538 (or 2752536 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 10.
The square root of 121111012 is about 11005.0448431617.
The cubic root of 121111012 is about 494.7599584372.
The spelling of 121111012 in words is "one hundred twenty-one million, one hundred eleven thousand, twelve".