212102121017 has 2 divisors, whose sum is σ = 212102121018. Its totient is φ = 212102121016.

The previous prime is 212102120999. The next prime is 212102121043. The reversal of 212102121017 is 710121201212.

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., 161472170896 + 50629950121 = 401836^2 + 225011^2 .

It is a cyclic number.

It is not a de Polignac number, because 212102121017 - 2⁸ = 212102120761 is a prime.

It is a super-2 number, since 2×212102121017² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212102121017.

It is not a weakly prime, because it can be changed into another prime (212102121617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051060508 + 106051060509.

It is an arithmetic number, because the mean of its divisors is an integer number (106051060509).

Almost surely, 2^212102121017 is an apocalyptic number.

It is an amenable number.

212102121017 is a deficient number, since it is larger than the sum of its proper divisors (1).

212102121017 is an equidigital number, since it uses as much as digits as its factorization.

212102121017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 212102121017 its reverse (710121201212), we get a palindrome (922223322229).

The spelling of 212102121017 in words is "two hundred twelve billion, one hundred two million, one hundred twenty-one thousand, seventeen".