213233210321231 has 2 divisors, whose sum is σ = 213233210321232. Its totient is φ = 213233210321230.

The previous prime is 213233210321143. The next prime is 213233210321251. The reversal of 213233210321231 is 132123012332312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213233210321231 is a prime.

It is a super-2 number, since 2×213233210321231² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 213233210321194 and 213233210321203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213233210321251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106616605160615 + 106616605160616.

It is an arithmetic number, because the mean of its divisors is an integer number (106616605160616).

Almost surely, 2^{213233210321231} is an apocalyptic number.

213233210321231 is a deficient number, since it is larger than the sum of its proper divisors (1).

213233210321231 is an equidigital number, since it uses as much as digits as its factorization.

213233210321231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 213233210321231 its reverse (132123012332312), we get a palindrome (345356222653543).

The spelling of 213233210321231 in words is "two hundred thirteen trillion, two hundred thirty-three billion, two hundred ten million, three hundred twenty-one thousand, two hundred thirty-one".