212431264117 has 2 divisors, whose sum is σ = 212431264118. Its totient is φ = 212431264116.

The previous prime is 212431264109. The next prime is 212431264139. The reversal of 212431264117 is 711462134212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193207718916 + 19223545201 = 439554^2 + 138649^2 .

It is a cyclic number.

It is not a de Polignac number, because 212431264117 - 2³ = 212431264109 is a prime.

It is a super-2 number, since 2×212431264117² (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 (212431264147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106215632058 + 106215632059.

It is an arithmetic number, because the mean of its divisors is an integer number (106215632059).

Almost surely, 2^212431264117 is an apocalyptic number.

It is an amenable number.

212431264117 is a deficient number, since it is larger than the sum of its proper divisors (1).

212431264117 is an equidigital number, since it uses as much as digits as its factorization.

212431264117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

Adding to 212431264117 its reverse (711462134212), we get a palindrome (923893398329).

The spelling of 212431264117 in words is "two hundred twelve billion, four hundred thirty-one million, two hundred sixty-four thousand, one hundred seventeen".