1168108421 has 2 divisors, whose sum is σ = 1168108422. Its totient is φ = 1168108420.

The previous prime is 1168108411. The next prime is 1168108423. The reversal of 1168108421 is 1248018611.

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., 997675396 + 170433025 = 31586^2 + 13055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1168108421 - 2¹⁰ = 1168107397 is a prime.

It is a super-2 number, since 2×1168108421² = 2728954566422226482, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1168108423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1168108423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 584054210 + 584054211.

It is an arithmetic number, because the mean of its divisors is an integer number (584054211).

Almost surely, 2^1168108421 is an apocalyptic number.

It is an amenable number.

1168108421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1168108421 is an equidigital number, since it uses as much as digits as its factorization.

1168108421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 1168108421 is about 34177.6011592388. The cubic root of 1168108421 is about 1053.1600705665.

The spelling of 1168108421 in words is "one billion, one hundred sixty-eight million, one hundred eight thousand, four hundred twenty-one".