1131212195 has 4 divisors (see below), whose sum is σ = 1357454640. Its totient is φ = 904969752.

The previous prime is 1131212191. The next prime is 1131212237. The reversal of 1131212195 is 5912121311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131212195 - 2² = 1131212191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131212191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113121215 + ... + 113121224.

It is an arithmetic number, because the mean of its divisors is an integer number (339363660).

Almost surely, 2^1131212195 is an apocalyptic number.

1131212195 is a deficient number, since it is larger than the sum of its proper divisors (226242445).

1131212195 is an equidigital number, since it uses as much as digits as its factorization.

1131212195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226242444.

The product of its digits is 540, while the sum is 26.

The square root of 1131212195 is about 33633.4981082848. The cubic root of 1131212195 is about 1041.9527521701.

The spelling of 1131212195 in words is "one billion, one hundred thirty-one million, two hundred twelve thousand, one hundred ninety-five".