2012021001 has 12 divisors (see below), whose sum is σ = 2907905728. Its totient is φ = 1340584344.

The previous prime is 2012020991. The next prime is 2012021021. The reversal of 2012021001 is 1001202102.

It is not a de Polignac number, because 2012021001 - 2⁶ = 2012020937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012021021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46645 + ... + 78738.

Almost surely, 2^2012021001 is an apocalyptic number.

It is an amenable number.

2012021001 is a deficient number, since it is larger than the sum of its proper divisors (895884727).

2012021001 is a wasteful number, since it uses less digits than its factorization.

2012021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127172 (or 127169 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2012021001 is about 44855.5570804778. The cubic root of 2012021001 is about 1262.4402614089.

Adding to 2012021001 its reverse (1001202102), we get a palindrome (3013223103).

It can be divided in two parts, 201 and 2021001, that added together give a palindrome (2021202).

The spelling of 2012021001 in words is "two billion, twelve million, twenty-one thousand, one".