1131212202217 has 2 divisors, whose sum is σ = 1131212202218. Its totient is φ = 1131212202216.

The previous prime is 1131212202187. The next prime is 1131212202227. The reversal of 1131212202217 is 7122022121311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113750958336 + 17461243881 = 1055344^2 + 132141^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131212202217 - 2³¹ = 1129064718569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131212202191 and 1131212202200.

It is not a weakly prime, because it can be changed into another prime (1131212202227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565606101108 + 565606101109.

It is an arithmetic number, because the mean of its divisors is an integer number (565606101109).

Almost surely, 2^{1131212202217} is an apocalyptic number.

It is an amenable number.

1131212202217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131212202217 is an equidigital number, since it uses as much as digits as its factorization.

1131212202217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 1131212202217 its reverse (7122022121311), we get a palindrome (8253234323528).

The spelling of 1131212202217 in words is "one trillion, one hundred thirty-one billion, two hundred twelve million, two hundred two thousand, two hundred seventeen".