1131355201 has 4 divisors (see below), whose sum is σ = 1131516100. Its totient is φ = 1131194304.

The previous prime is 1131355157. The next prime is 1131355207. The reversal of 1131355201 is 1025531311.

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

It can be written as a sum of positive squares in 2 ways, for example, as 915970225 + 215384976 = 30265^2 + 14676^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131355201 - 2⁹ = 1131354689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131355207) 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, 69396 + ... + 84133.

It is an arithmetic number, because the mean of its divisors is an integer number (282879025).

Almost surely, 2^1131355201 is an apocalyptic number.

It is an amenable number.

1131355201 is a deficient number, since it is larger than the sum of its proper divisors (160899).

1131355201 is an equidigital number, since it uses as much as digits as its factorization.

1131355201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160898.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 1131355201 is about 33635.6239870766. The cubic root of 1131355201 is about 1041.9966576423.

Adding to 1131355201 its reverse (1025531311), we get a palindrome (2156886512).

It can be divided in two parts, 113135 and 5201, that added together give a square (118336 = 344²).

The spelling of 1131355201 in words is "one billion, one hundred thirty-one million, three hundred fifty-five thousand, two hundred one".