213231004117 has 2 divisors, whose sum is σ = 213231004118. Its totient is φ = 213231004116.

The previous prime is 213231004099. The next prime is 213231004121. The reversal of 213231004117 is 711400132312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162603304081 + 50627700036 = 403241^2 + 225006^2 .

It is a cyclic number.

It is not a de Polignac number, because 213231004117 - 2¹¹ = 213231002069 is a prime.

It is a super-2 number, since 2×213231004117² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213231004091 and 213231004100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213231004127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106615502058 + 106615502059.

It is an arithmetic number, because the mean of its divisors is an integer number (106615502059).

Almost surely, 2^213231004117 is an apocalyptic number.

It is an amenable number.

213231004117 is a deficient number, since it is larger than the sum of its proper divisors (1).

213231004117 is an equidigital number, since it uses as much as digits as its factorization.

213231004117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 213231004117 its reverse (711400132312), we get a palindrome (924631136429).

The spelling of 213231004117 in words is "two hundred thirteen billion, two hundred thirty-one million, four thousand, one hundred seventeen".