2001012203 has 4 divisors (see below), whose sum is σ = 2012994480. Its totient is φ = 1989029928.

The previous prime is 2001012179. The next prime is 2001012229. The reversal of 2001012203 is 3022101002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001012203 - 2²² = 1996817899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001012103) 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 3 ways as a sum of consecutive naturals, for example, 5990888 + ... + 5991221.

It is an arithmetic number, because the mean of its divisors is an integer number (503248620).

Almost surely, 2^2001012203 is an apocalyptic number.

2001012203 is a deficient number, since it is larger than the sum of its proper divisors (11982277).

2001012203 is a wasteful number, since it uses less digits than its factorization.

2001012203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11982276.

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

The square root of 2001012203 is about 44732.6748920741. The cubic root of 2001012203 is about 1260.1335633589.

Adding to 2001012203 its reverse (3022101002), we get a palindrome (5023113205).

The spelling of 2001012203 in words is "two billion, one million, twelve thousand, two hundred three".