202112121017 has 2 divisors, whose sum is σ = 202112121018. Its totient is φ = 202112121016.

The previous prime is 202112120939. The next prime is 202112121031. The reversal of 202112121017 is 710121211202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144634935481 + 57477185536 = 380309^2 + 239744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202112121017 is a prime.

It is a super-2 number, since 2×202112121017² (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 202112121017.

It is not a weakly prime, because it can be changed into another prime (202112121077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101056060508 + 101056060509.

It is an arithmetic number, because the mean of its divisors is an integer number (101056060509).

Almost surely, 2^202112121017 is an apocalyptic number.

It is an amenable number.

202112121017 is a deficient number, since it is larger than the sum of its proper divisors (1).

202112121017 is an equidigital number, since it uses as much as digits as its factorization.

202112121017 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 202112121017 its reverse (710121211202), we get a palindrome (912233332219).

The spelling of 202112121017 in words is "two hundred two billion, one hundred twelve million, one hundred twenty-one thousand, seventeen".