2131120005 has 24 divisors (see below), whose sum is σ = 3966494112. Its totient is φ = 974225952.

The previous prime is 2131120001. The next prime is 2131120021. The reversal of 2131120005 is 5000211312.

It is not a de Polignac number, because 2131120005 - 2² = 2131120001 is a prime.

It is a super-2 number, since 2×2131120005² = 9083344951422400050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131120001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1449007 + ... + 1450476.

It is an arithmetic number, because the mean of its divisors is an integer number (165270588).

Almost surely, 2^2131120005 is an apocalyptic number.

It is an amenable number.

2131120005 is a deficient number, since it is larger than the sum of its proper divisors (1835374107).

2131120005 is a wasteful number, since it uses less digits than its factorization.

2131120005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899505 (or 2899498 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 2131120005 is about 46164.0553352931. The cubic root of 2131120005 is about 1286.8738285446.

Adding to 2131120005 its reverse (5000211312), we get a palindrome (7131331317).

The spelling of 2131120005 in words is "two billion, one hundred thirty-one million, one hundred twenty thousand, five".