213051011316243 has 4 divisors (see below), whose sum is σ = 284068015088328. Its totient is φ = 142034007544160.

The previous prime is 213051011316203. The next prime is 213051011316391. The reversal of 213051011316243 is 342613110150312.

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 213051011316243 - 2⁹ = 213051011315731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213051011316203) 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 3 ways as a sum of consecutive naturals, for example, 35508501886038 + ... + 35508501886043.

It is an arithmetic number, because the mean of its divisors is an integer number (71017003772082).

Almost surely, 2^{213051011316243} is an apocalyptic number.

213051011316243 is a deficient number, since it is larger than the sum of its proper divisors (71017003772085).

213051011316243 is an equidigital number, since it uses as much as digits as its factorization.

213051011316243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71017003772084.

The product of its (nonzero) digits is 12960, while the sum is 33.

Adding to 213051011316243 its reverse (342613110150312), we get a palindrome (555664121466555).

The spelling of 213051011316243 in words is "two hundred thirteen trillion, fifty-one billion, eleven million, three hundred sixteen thousand, two hundred forty-three".