2001311211002 has 4 divisors (see below), whose sum is σ = 3001966816506. Its totient is φ = 1000655605500.

The previous prime is 2001311210963. The next prime is 2001311211007. The reversal of 2001311211002 is 2001121131002.

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., 1519354529641 + 481956681361 = 1232621^2 + 694231^2 .

It is not an unprimeable number, because it can be changed into a prime (2001311211007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500327802749 + ... + 500327802752.

Almost surely, 2^{2001311211002} is an apocalyptic number.

2001311211002 is a deficient number, since it is larger than the sum of its proper divisors (1000655605504).

2001311211002 is a wasteful number, since it uses less digits than its factorization.

2001311211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000655605503.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 2001311211002 its reverse (2001121131002), we get a palindrome (4002432342004).

The spelling of 2001311211002 in words is "two trillion, one billion, three hundred eleven million, two hundred eleven thousand, two".