2001311121131 has 8 divisors (see below), whose sum is σ = 2287223566080. Its totient is φ = 1715401390248.

The previous prime is 2001311121119. The next prime is 2001311121137. The reversal of 2001311121131 is 1311211131002.

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

It is a de Polignac number, because none of the positive numbers 2^k-2001311121131 is a prime.

It is a super-2 number, since 2×2001311121131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001311121137) 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, 1277540 + ... + 2373758.

It is an arithmetic number, because the mean of its divisors is an integer number (285902945760).

Almost surely, 2^{2001311121131} is an apocalyptic number.

2001311121131 is a deficient number, since it is larger than the sum of its proper divisors (285912444949).

2001311121131 is a wasteful number, since it uses less digits than its factorization.

2001311121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357033.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 2001311121131 its reverse (1311211131002), we get a palindrome (3312522252133).

The spelling of 2001311121131 in words is "two trillion, one billion, three hundred eleven million, one hundred twenty-one thousand, one hundred thirty-one".