1198115101 has 2 divisors, whose sum is σ = 1198115102. Its totient is φ = 1198115100.

The previous prime is 1198115099. The next prime is 1198115111. The reversal of 1198115101 is 1015118911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1181296900 + 16818201 = 34370^2 + 4101^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198115101 - 2¹ = 1198115099 is a prime.

Together with 1198115099, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1198115101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198115111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599057550 + 599057551.

It is an arithmetic number, because the mean of its divisors is an integer number (599057551).

Almost surely, 2^1198115101 is an apocalyptic number.

It is an amenable number.

1198115101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198115101 is an equidigital number, since it uses as much as digits as its factorization.

1198115101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 28.

The square root of 1198115101 is about 34613.7992858340. The cubic root of 1198115101 is about 1062.1018875911.

The spelling of 1198115101 in words is "one billion, one hundred ninety-eight million, one hundred fifteen thousand, one hundred one".