1131203401 has 8 divisors (see below), whose sum is σ = 1166139360. Its totient is φ = 1096792992.

The previous prime is 1131203393. The next prime is 1131203429. The reversal of 1131203401 is 1043021311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131203401 - 2³ = 1131203393 is a prime.

It is a super-2 number, since 2×1131203401² = 2559242268867933602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131203461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127015 + ... + 135628.

It is an arithmetic number, because the mean of its divisors is an integer number (145767420).

Almost surely, 2^1131203401 is an apocalyptic number.

It is an amenable number.

1131203401 is a deficient number, since it is larger than the sum of its proper divisors (34935959).

1131203401 is an equidigital number, since it uses as much as digits as its factorization.

1131203401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262775.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1131203401 is about 33633.3673752718. The cubic root of 1131203401 is about 1041.9500521296.

Adding to 1131203401 its reverse (1043021311), we get a palindrome (2174224712).

The spelling of 1131203401 in words is "one billion, one hundred thirty-one million, two hundred three thousand, four hundred one".