1166202131 has 4 divisors (see below), whose sum is σ = 1166436912. Its totient is φ = 1165967352.

The previous prime is 1166202127. The next prime is 1166202137. The reversal of 1166202131 is 1312026611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1312026611 = 7 ⋅187432373.

It is a cyclic number.

It is not a de Polignac number, because 1166202131 - 2² = 1166202127 is a prime.

It is a super-2 number, since 2×1166202131² = 2720054820697882322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1166202097 and 1166202106.

It is not an unprimeable number, because it can be changed into a prime (1166202137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109775 + ... + 119928.

It is an arithmetic number, because the mean of its divisors is an integer number (291609228).

Almost surely, 2^1166202131 is an apocalyptic number.

1166202131 is a deficient number, since it is larger than the sum of its proper divisors (234781).

1166202131 is an equidigital number, since it uses as much as digits as its factorization.

1166202131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234780.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1166202131 is about 34149.7017702937. The cubic root of 1166202131 is about 1052.5868584742.

Adding to 1166202131 its reverse (1312026611), we get a palindrome (2478228742).

The spelling of 1166202131 in words is "one billion, one hundred sixty-six million, two hundred two thousand, one hundred thirty-one".