213201311231 has 2 divisors, whose sum is σ = 213201311232. Its totient is φ = 213201311230.

The previous prime is 213201311131. The next prime is 213201311269. The reversal of 213201311231 is 132113102312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213201311231 - 2³⁴ = 196021442047 is a prime.

It is a super-2 number, since 2×213201311231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213201311291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106600655615 + 106600655616.

It is an arithmetic number, because the mean of its divisors is an integer number (106600655616).

Almost surely, 2^213201311231 is an apocalyptic number.

213201311231 is a deficient number, since it is larger than the sum of its proper divisors (1).

213201311231 is an equidigital number, since it uses as much as digits as its factorization.

213201311231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213201311231 its reverse (132113102312), we get a palindrome (345314413543).

The spelling of 213201311231 in words is "two hundred thirteen billion, two hundred one million, three hundred eleven thousand, two hundred thirty-one".