1011212220017 has 2 divisors, whose sum is σ = 1011212220018. Its totient is φ = 1011212220016.

The previous prime is 1011212219981. The next prime is 1011212220041. The reversal of 1011212220017 is 7100222121101.

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., 684120877456 + 327091342561 = 827116^2 + 571919^2 .

It is an emirp because it is prime and its reverse (7100222121101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011212220017 - 2¹⁰ = 1011212218993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011212820017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505606110008 + 505606110009.

It is an arithmetic number, because the mean of its divisors is an integer number (505606110009).

Almost surely, 2^{1011212220017} is an apocalyptic number.

It is an amenable number.

1011212220017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011212220017 is an equidigital number, since it uses as much as digits as its factorization.

1011212220017 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 1011212220017 its reverse (7100222121101), we get a palindrome (8111434341118).

The spelling of 1011212220017 in words is "one trillion, eleven billion, two hundred twelve million, two hundred twenty thousand, seventeen".