1171134231251 has 4 divisors (see below), whose sum is σ = 1171355080272. Its totient is φ = 1170913382232.

The previous prime is 1171134231227. The next prime is 1171134231313. The reversal of 1171134231251 is 1521324311711.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1171134231251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1171134231151) 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, 110416556 + ... + 110427161.

It is an arithmetic number, because the mean of its divisors is an integer number (292838770068).

Almost surely, 2^{1171134231251} is an apocalyptic number.

1171134231251 is a deficient number, since it is larger than the sum of its proper divisors (220849021).

1171134231251 is an equidigital number, since it uses as much as digits as its factorization.

1171134231251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220849020.

The product of its digits is 5040, while the sum is 32.

Adding to 1171134231251 its reverse (1521324311711), we get a palindrome (2692458542962).

The spelling of 1171134231251 in words is "one trillion, one hundred seventy-one billion, one hundred thirty-four million, two hundred thirty-one thousand, two hundred fifty-one".