1131020441 has 4 divisors (see below), whose sum is σ = 1131153792. Its totient is φ = 1130887092.

The previous prime is 1131020437. The next prime is 1131020491. The reversal of 1131020441 is 1440201311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1131020441 - 2² = 1131020437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131020431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53021 + ... + 71226.

It is an arithmetic number, because the mean of its divisors is an integer number (282788448).

Almost surely, 2^1131020441 is an apocalyptic number.

It is an amenable number.

1131020441 is a deficient number, since it is larger than the sum of its proper divisors (133351).

1131020441 is an equidigital number, since it uses as much as digits as its factorization.

1131020441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133350.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1131020441 is about 33630.6473473229. The cubic root of 1131020441 is about 1041.8938743576.

Adding to 1131020441 its reverse (1440201311), we get a palindrome (2571221752).

The spelling of 1131020441 in words is "one billion, one hundred thirty-one million, twenty thousand, four hundred forty-one".