1200012020 has 24 divisors (see below), whose sum is σ = 2538160800. Its totient is φ = 476550432.

The previous prime is 1200012019. The next prime is 1200012053. The reversal of 1200012020 is 202100021.

It is a junction number, because it is equal to n+sod(n) for n = 1200011989 and 1200012007.

It is a congruent number.

It is an unprimeable number.

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, 213050 + ... + 218609.

It is an arithmetic number, because the mean of its divisors is an integer number (105756700).

Almost surely, 2^1200012020 is an apocalyptic number.

1200012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200012020 is an abundant number, since it is smaller than the sum of its proper divisors (1338148780).

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

1200012020 is a wasteful number, since it uses less digits than its factorization.

1200012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431807 (or 431805 counting only the distinct ones).

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

The square root of 1200012020 is about 34641.1896446990. The cubic root of 1200012020 is about 1062.6621172697.

Adding to 1200012020 its reverse (202100021), we get a palindrome (1402112041).

The spelling of 1200012020 in words is "one billion, two hundred million, twelve thousand, twenty".