212241551317 has 2 divisors, whose sum is σ = 212241551318. Its totient is φ = 212241551316.

The previous prime is 212241551309. The next prime is 212241551519. The reversal of 212241551317 is 713155142212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148029484516 + 64212066801 = 384746^2 + 253401^2 .

It is a cyclic number.

It is not a de Polignac number, because 212241551317 - 2³ = 212241551309 is a prime.

It is a super-2 number, since 2×212241551317² (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 (212241551117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106120775658 + 106120775659.

It is an arithmetic number, because the mean of its divisors is an integer number (106120775659).

Almost surely, 2^212241551317 is an apocalyptic number.

It is an amenable number.

212241551317 is a deficient number, since it is larger than the sum of its proper divisors (1).

212241551317 is an equidigital number, since it uses as much as digits as its factorization.

212241551317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 34.

Adding to 212241551317 its reverse (713155142212), we get a palindrome (925396693529).

The spelling of 212241551317 in words is "two hundred twelve billion, two hundred forty-one million, five hundred fifty-one thousand, three hundred seventeen".