1198911101 has 4 divisors (see below), whose sum is σ = 1199436252. Its totient is φ = 1198385952.

The previous prime is 1198911089. The next prime is 1198911113. The reversal of 1198911101 is 1011198911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1011198911 = 9883 ⋅102317.

It is an interprime number because it is at equal distance from previous prime (1198911089) and next prime (1198911113).

It can be written as a sum of positive squares in 2 ways, for example, as 770007001 + 428904100 = 27749^2 + 20710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198911101 - 2¹⁰ = 1198910077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198911151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259136 + ... + 263721.

It is an arithmetic number, because the mean of its divisors is an integer number (299859063).

Almost surely, 2^1198911101 is an apocalyptic number.

It is an amenable number.

1198911101 is a deficient number, since it is larger than the sum of its proper divisors (525151).

1198911101 is an equidigital number, since it uses as much as digits as its factorization.

1198911101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525150.

The product of its (nonzero) digits is 648, while the sum is 32.

The square root of 1198911101 is about 34625.2956810480. The cubic root of 1198911101 is about 1062.3370475080.

The spelling of 1198911101 in words is "one billion, one hundred ninety-eight million, nine hundred eleven thousand, one hundred one".