1166098121 has 2 divisors, whose sum is σ = 1166098122. Its totient is φ = 1166098120.

The previous prime is 1166098067. The next prime is 1166098127. The reversal of 1166098121 is 1218906611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 593166025 + 572932096 = 24355^2 + 23936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166098121 - 2²⁶ = 1098989257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1166098127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583049060 + 583049061.

It is an arithmetic number, because the mean of its divisors is an integer number (583049061).

Almost surely, 2^1166098121 is an apocalyptic number.

It is an amenable number.

1166098121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166098121 is an equidigital number, since it uses as much as digits as its factorization.

1166098121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1166098121 is about 34148.1788826286. The cubic root of 1166098121 is about 1052.5555652100. Note that the first 4 decimals are identical.

The spelling of 1166098121 in words is "one billion, one hundred sixty-six million, ninety-eight thousand, one hundred twenty-one".