213012311 has 2 divisors, whose sum is σ = 213012312. Its totient is φ = 213012310.

The previous prime is 213012301. The next prime is 213012313. The reversal of 213012311 is 113210312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213012311 - 2¹⁰ = 213011287 is a prime.

Together with 213012313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213012313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106506155 + 106506156.

It is an arithmetic number, because the mean of its divisors is an integer number (106506156).

Almost surely, 2^213012311 is an apocalyptic number.

213012311 is a deficient number, since it is larger than the sum of its proper divisors (1).

213012311 is an equidigital number, since it uses as much as digits as its factorization.

213012311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 213012311 is about 14594.9412811426. The cubic root of 213012311 is about 597.2207676189.

Adding to 213012311 its reverse (113210312), we get a palindrome (326222623).

It can be divided in two parts, 2130 and 12311, that added together give a palindrome (14441).

The spelling of 213012311 in words is "two hundred thirteen million, twelve thousand, three hundred eleven".