1200012121 has 8 divisors (see below), whose sum is σ = 1496119104. Its totient is φ = 935074320.

The previous prime is 1200012101. The next prime is 1200012173. The reversal of 1200012121 is 1212100021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200012121 - 2⁹ = 1200011609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200012098 and 1200012107.

It is not an unprimeable number, because it can be changed into a prime (1200012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7792210 + ... + 7792363.

It is an arithmetic number, because the mean of its divisors is an integer number (187014888).

Almost surely, 2^1200012121 is an apocalyptic number.

1200012121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200012121 is a deficient number, since it is larger than the sum of its proper divisors (296106983).

1200012121 is a wasteful number, since it uses less digits than its factorization.

1200012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15584591.

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

The square root of 1200012121 is about 34641.1911025011. The cubic root of 1200012121 is about 1062.6621470829.

Adding to 1200012121 its reverse (1212100021), we get a palindrome (2412112142).

The spelling of 1200012121 in words is "one billion, two hundred million, twelve thousand, one hundred twenty-one".