213131110043387 has 2 divisors, whose sum is σ = 213131110043388. Its totient is φ = 213131110043386.

The previous prime is 213131110043347. The next prime is 213131110043407. The reversal of 213131110043387 is 783340011131312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213131110043387 - 2³⁶ = 213062390566651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213131110043387.

It is not a weakly prime, because it can be changed into another prime (213131110043347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565555021693 + 106565555021694.

It is an arithmetic number, because the mean of its divisors is an integer number (106565555021694).

Almost surely, 2^{213131110043387} is an apocalyptic number.

213131110043387 is a deficient number, since it is larger than the sum of its proper divisors (1).

213131110043387 is an equidigital number, since it uses as much as digits as its factorization.

213131110043387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

Adding to 213131110043387 its reverse (783340011131312), we get a palindrome (996471121174699).

The spelling of 213131110043387 in words is "two hundred thirteen trillion, one hundred thirty-one billion, one hundred ten million, forty-three thousand, three hundred eighty-seven".