212030321317 has 2 divisors, whose sum is σ = 212030321318. Its totient is φ = 212030321316.

The previous prime is 212030321309. The next prime is 212030321387. The reversal of 212030321317 is 713123030212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146695894081 + 65334427236 = 383009^2 + 255606^2 .

It is a cyclic number.

It is not a de Polignac number, because 212030321317 - 2³ = 212030321309 is a prime.

It is a super-2 number, since 2×212030321317² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212030321291 and 212030321300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212030321387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106015160658 + 106015160659.

It is an arithmetic number, because the mean of its divisors is an integer number (106015160659).

Almost surely, 2^212030321317 is an apocalyptic number.

It is an amenable number.

212030321317 is a deficient number, since it is larger than the sum of its proper divisors (1).

212030321317 is an equidigital number, since it uses as much as digits as its factorization.

212030321317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 212030321317 its reverse (713123030212), we get a palindrome (925153351529).

The spelling of 212030321317 in words is "two hundred twelve billion, thirty million, three hundred twenty-one thousand, three hundred seventeen".