213113123232131 has 4 divisors (see below), whose sum is σ = 213123899058312. Its totient is φ = 213102347405952.

The previous prime is 213113123232127. The next prime is 213113123232151. The reversal of 213113123232131 is 131232321311312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213113123232131 - 2² = 213113123232127 is a prime.

It is a super-2 number, since 2×213113123232131² (a number of 29 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 = 213113123232094 and 213113123232103.

It is not an unprimeable number, because it can be changed into a prime (213113123232101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5387883425 + ... + 5387922978.

It is an arithmetic number, because the mean of its divisors is an integer number (53280974764578).

Almost surely, 2^{213113123232131} is an apocalyptic number.

213113123232131 is a deficient number, since it is larger than the sum of its proper divisors (10775826181).

213113123232131 is a wasteful number, since it uses less digits than its factorization.

213113123232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10775826180.

The product of its digits is 3888, while the sum is 29.

Adding to 213113123232131 its reverse (131232321311312), we get a palindrome (344345444543443).

The spelling of 213113123232131 in words is "two hundred thirteen trillion, one hundred thirteen billion, one hundred twenty-three million, two hundred thirty-two thousand, one hundred thirty-one".