1212211100017 has 2 divisors, whose sum is σ = 1212211100018. Its totient is φ = 1212211100016.

The previous prime is 1212211100003. The next prime is 1212211100029. The reversal of 1212211100017 is 7100011122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1182925965376 + 29285134641 = 1087624^2 + 171129^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212211100017 - 2³⁵ = 1177851361649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212211099967 and 1212211100003.

It is not a weakly prime, because it can be changed into another prime (1212211200017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105550008 + 606105550009.

It is an arithmetic number, because the mean of its divisors is an integer number (606105550009).

Almost surely, 2^{1212211100017} is an apocalyptic number.

It is an amenable number.

1212211100017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212211100017 is an equidigital number, since it uses as much as digits as its factorization.

1212211100017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 1212211100017 its reverse (7100011122121), we get a palindrome (8312222222138).

The spelling of 1212211100017 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred thousand, seventeen".