1200330021 has 32 divisors (see below), whose sum is σ = 1783260288. Its totient is φ = 712074240.

The previous prime is 1200330007. The next prime is 1200330041.

It is a happy number.

1200330021 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1200330021 - 2⁹ = 1200329509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200329979 and 1200330006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200330041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328215 + ... + 331851.

It is an arithmetic number, because the mean of its divisors is an integer number (55726884).

Almost surely, 2^1200330021 is an apocalyptic number.

1200330021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200330021 is a deficient number, since it is larger than the sum of its proper divisors (582930267).

1200330021 is a wasteful number, since it uses less digits than its factorization.

1200330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1200330021 is about 34645.7792667447. The cubic root of 1200330021 is about 1062.7559768212.

It can be divided in two parts, 12003 and 30021, that added together give a palindrome (42024).

The spelling of 1200330021 in words is "one billion, two hundred million, three hundred thirty thousand, twenty-one".