2001123002 has 4 divisors (see below), whose sum is σ = 3001684506. Its totient is φ = 1000561500.

The previous prime is 2001122987. The next prime is 2001123013. The reversal of 2001123002 is 2003211002.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1343149201 + 657973801 = 36649^2 + 25651^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500280749 + ... + 500280752.

Almost surely, 2^2001123002 is an apocalyptic number.

2001123002 is a deficient number, since it is larger than the sum of its proper divisors (1000561504).

2001123002 is a wasteful number, since it uses less digits than its factorization.

2001123002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000561503.

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

The square root of 2001123002 is about 44733.9133320571. The cubic root of 2001123002 is about 1260.1568214149.

Adding to 2001123002 its reverse (2003211002), we get a palindrome (4004334004).

The spelling of 2001123002 in words is "two billion, one million, one hundred twenty-three thousand, two".