2001211131123 has 12 divisors (see below), whose sum is σ = 2890815494320. Its totient is φ = 1334058972336.

The previous prime is 2001211131119. The next prime is 2001211131163. The reversal of 2001211131123 is 3211311121002.

2001211131123 is a `hidden beast` number, since 200 + 1 + 211 + 131 + 123 = 666.

It is not a de Polignac number, because 2001211131123 - 2² = 2001211131119 is a prime.

It is a super-2 number, since 2×2001211131123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001211131096 and 2001211131105.

It is not an unprimeable number, because it can be changed into a prime (2001211131163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6659983 + ... + 6953976.

Almost surely, 2^{2001211131123} is an apocalyptic number.

2001211131123 is a deficient number, since it is larger than the sum of its proper divisors (889604363197).

2001211131123 is a wasteful number, since it uses less digits than its factorization.

2001211131123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13630298 (or 13630295 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 2001211131123 its reverse (3211311121002), we get a palindrome (5212522252125).

The spelling of 2001211131123 in words is "two trillion, one billion, two hundred eleven million, one hundred thirty-one thousand, one hundred twenty-three".