2001311121 has 8 divisors (see below), whose sum is σ = 2784432960. Its totient is φ = 1276198352.

The previous prime is 2001311107. The next prime is 2001311129. The reversal of 2001311121 is 1211131002.

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 2001311121 - 2⁶ = 2001311057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001311097 and 2001311106.

It is not an unprimeable number, because it can be changed into a prime (2001311129) 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, 14502186 + ... + 14502323.

It is an arithmetic number, because the mean of its divisors is an integer number (348054120).

Almost surely, 2^2001311121 is an apocalyptic number.

It is an amenable number.

2001311121 is a deficient number, since it is larger than the sum of its proper divisors (783121839).

2001311121 is a wasteful number, since it uses less digits than its factorization.

2001311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29004535.

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

The square root of 2001311121 is about 44736.0159267676. The cubic root of 2001311121 is about 1260.1963079120.

Adding to 2001311121 its reverse (1211131002), we get a palindrome (3212442123).

The spelling of 2001311121 in words is "two billion, one million, three hundred eleven thousand, one hundred twenty-one".