1117531806221 has 2 divisors, whose sum is σ = 1117531806222. Its totient is φ = 1117531806220.

The previous prime is 1117531806191. The next prime is 1117531806301. The reversal of 1117531806221 is 1226081357111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 685560816196 + 431970990025 = 827986^2 + 657245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1117531806221 - 2³⁸ = 842653899277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1117531806121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558765903110 + 558765903111.

It is an arithmetic number, because the mean of its divisors is an integer number (558765903111).

Almost surely, 2^{1117531806221} is an apocalyptic number.

It is an amenable number.

1117531806221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117531806221 is an equidigital number, since it uses as much as digits as its factorization.

1117531806221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 1117531806221 in words is "one trillion, one hundred seventeen billion, five hundred thirty-one million, eight hundred six thousand, two hundred twenty-one".