213031231011311 has 4 divisors (see below), whose sum is σ = 213070126622232. Its totient is φ = 212992335400392.

The previous prime is 213031231011281. The next prime is 213031231011457. The reversal of 213031231011311 is 113110132130312.

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 213031231011311 - 2³⁰ = 213030157269487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213031231011611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19447797245 + ... + 19447808198.

It is an arithmetic number, because the mean of its divisors is an integer number (53267531655558).

Almost surely, 2^{213031231011311} is an apocalyptic number.

213031231011311 is a deficient number, since it is larger than the sum of its proper divisors (38895610921).

213031231011311 is an equidigital number, since it uses as much as digits as its factorization.

213031231011311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38895610920.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 213031231011311 its reverse (113110132130312), we get a palindrome (326141363141623).

The spelling of 213031231011311 in words is "two hundred thirteen trillion, thirty-one billion, two hundred thirty-one million, eleven thousand, three hundred eleven".