2001001213 has 8 divisors (see below), whose sum is σ = 2014241400. Its totient is φ = 1987780608.

The previous prime is 2001001183. The next prime is 2001001241. The reversal of 2001001213 is 3121001002.

It can be written as a sum of positive squares in 4 ways, for example, as 2732409 + 1998268804 = 1653^2 + 44702^2 .

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 2001001213 - 2¹³ = 2000993021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001001213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001001243) 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, 239653 + ... + 247861.

It is an arithmetic number, because the mean of its divisors is an integer number (251780175).

Almost surely, 2^2001001213 is an apocalyptic number.

It is an amenable number.

2001001213 is a deficient number, since it is larger than the sum of its proper divisors (13240187).

2001001213 is a wasteful number, since it uses less digits than its factorization.

2001001213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9791.

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

The square root of 2001001213 is about 44732.5520510511. The cubic root of 2001001213 is about 1260.1312563776.

Adding to 2001001213 its reverse (3121001002), we get a palindrome (5122002215).

The spelling of 2001001213 in words is "two billion, one million, one thousand, two hundred thirteen".