1200121012 has 12 divisors (see below), whose sum is σ = 2101286880. Its totient is φ = 599753336.

The previous prime is 1200121009. The next prime is 1200121019. The reversal of 1200121012 is 2101210021.

It is a self number, because there is not a number n which added to its sum of digits gives 1200121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200121019) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 67888 + ... + 83719.

It is an arithmetic number, because the mean of its divisors is an integer number (175107240).

Almost surely, 2^1200121012 is an apocalyptic number.

It is an amenable number.

1200121012 is a deficient number, since it is larger than the sum of its proper divisors (901165868).

1200121012 is a wasteful number, since it uses less digits than its factorization.

1200121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153590 (or 153588 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1200121012 is about 34642.7627651144. The cubic root of 1200121012 is about 1062.6942886594.

Adding to 1200121012 its reverse (2101210021), we get a palindrome (3301331033).

The spelling of 1200121012 in words is "one billion, two hundred million, one hundred twenty-one thousand, twelve".