2001121003 has 8 divisors (see below), whose sum is σ = 2386430208. Its totient is φ = 1640670504.

The previous prime is 2001120973. The next prime is 2001121019. The reversal of 2001121003 is 3001211002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001121003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001121033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6214501 + ... + 6214822.

It is an arithmetic number, because the mean of its divisors is an integer number (298303776).

Almost surely, 2^2001121003 is an apocalyptic number.

2001121003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2001121003 is a deficient number, since it is larger than the sum of its proper divisors (385309205).

2001121003 is a wasteful number, since it uses less digits than its factorization.

2001121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12429353.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2001121003 is about 44733.8909888241. The cubic root of 2001121003 is about 1260.1564018081.

Adding to 2001121003 its reverse (3001211002), we get a palindrome (5002332005).

It can be divided in two parts, 20011 and 21003, that added together give a palindrome (41014).

The spelling of 2001121003 in words is "two billion, one million, one hundred twenty-one thousand, three".