2131121243005 has 32 divisors (see below), whose sum is σ = 2629692027648. Its totient is φ = 1657352793600.

The previous prime is 2131121242997. The next prime is 2131121243039. The reversal of 2131121243005 is 5003421211312.

It is not a de Polignac number, because 2131121243005 - 2³ = 2131121242997 is a prime.

It is a super-2 number, since 2×2131121243005² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100461850 + ... + 100483060.

It is an arithmetic number, because the mean of its divisors is an integer number (82177875864).

Almost surely, 2^{2131121243005} is an apocalyptic number.

It is an amenable number.

2131121243005 is a deficient number, since it is larger than the sum of its proper divisors (498570784643).

2131121243005 is a wasteful number, since it uses less digits than its factorization.

2131121243005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25237.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 2131121243005 its reverse (5003421211312), we get a palindrome (7134542454317).

The spelling of 2131121243005 in words is "two trillion, one hundred thirty-one billion, one hundred twenty-one million, two hundred forty-three thousand, five".