1131443101 has 4 divisors (see below), whose sum is σ = 1131535804. Its totient is φ = 1131350400.

The previous prime is 1131443083. The next prime is 1131443119. The reversal of 1131443101 is 1013441311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (1131443083) and next prime (1131443119).

It can be written as a sum of positive squares in 2 ways, for example, as 611375076 + 520068025 = 24726^2 + 22805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131443101 - 2⁹ = 1131442589 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 (1131447101) 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, 24660 + ... + 53581.

It is an arithmetic number, because the mean of its divisors is an integer number (282883951).

Almost surely, 2^1131443101 is an apocalyptic number.

It is an amenable number.

1131443101 is a deficient number, since it is larger than the sum of its proper divisors (92703).

1131443101 is an equidigital number, since it uses as much as digits as its factorization.

1131443101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92702.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1131443101 is about 33636.9306120520. The cubic root of 1131443101 is about 1042.0236427230.

Adding to 1131443101 its reverse (1013441311), we get a palindrome (2144884412).

The spelling of 1131443101 in words is "one billion, one hundred thirty-one million, four hundred forty-three thousand, one hundred one".