202122122017 has 2 divisors, whose sum is σ = 202122122018. Its totient is φ = 202122122016.

The previous prime is 202122121991. The next prime is 202122122051. The reversal of 202122122017 is 710221221202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142212706321 + 59909415696 = 377111^2 + 244764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202122122017 is a prime.

It is a super-2 number, since 2×202122122017² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (202122122087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101061061008 + 101061061009.

It is an arithmetic number, because the mean of its divisors is an integer number (101061061009).

Almost surely, 2^202122122017 is an apocalyptic number.

It is an amenable number.

202122122017 is a deficient number, since it is larger than the sum of its proper divisors (1).

202122122017 is an equidigital number, since it uses as much as digits as its factorization.

202122122017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 202122122017 its reverse (710221221202), we get a palindrome (912343343219).

The spelling of 202122122017 in words is "two hundred two billion, one hundred twenty-two million, one hundred twenty-two thousand, seventeen".