2131223113121 has 8 divisors (see below), whose sum is σ = 2141261742720. Its totient is φ = 2121190849008.

The previous prime is 2131223113087. The next prime is 2131223113139. The reversal of 2131223113121 is 1213113221312.

It is a happy number.

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 2131223113121 - 2³⁴ = 2114043243937 is a prime.

It is a super-2 number, since 2×2131223113121² (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 (2131223113141) 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 7 ways as a sum of consecutive naturals, for example, 919511 + ... + 2260076.

It is an arithmetic number, because the mean of its divisors is an integer number (267657717840).

Almost surely, 2^{2131223113121} is an apocalyptic number.

It is an amenable number.

2131223113121 is a deficient number, since it is larger than the sum of its proper divisors (10038629599).

2131223113121 is a wasteful number, since it uses less digits than its factorization.

2131223113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3182743.

The product of its digits is 432, while the sum is 23.

Adding to 2131223113121 its reverse (1213113221312), we get a palindrome (3344336334433).

The spelling of 2131223113121 in words is "two trillion, one hundred thirty-one billion, two hundred twenty-three million, one hundred thirteen thousand, one hundred twenty-one".