2012030021 has 8 divisors (see below), whose sum is σ = 2046240000. Its totient is φ = 1977983280.

The previous prime is 2012030017. The next prime is 2012030057. The reversal of 2012030021 is 1200302102.

It is a happy number.

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 2012030021 - 2² = 2012030017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2012029984 and 2012030011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012030011) 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, 15821 + ... + 65378.

It is an arithmetic number, because the mean of its divisors is an integer number (255780000).

Almost surely, 2^2012030021 is an apocalyptic number.

It is an amenable number.

2012030021 is a deficient number, since it is larger than the sum of its proper divisors (34209979).

2012030021 is an equidigital number, since it uses as much as digits as its factorization.

2012030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81619.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2012030021 is about 44855.6576253208. The cubic root of 2012030021 is about 1262.4421479356.

Adding to 2012030021 its reverse (1200302102), we get a palindrome (3212332123).

The spelling of 2012030021 in words is "two billion, twelve million, thirty thousand, twenty-one".