1131210203 has 4 divisors (see below), whose sum is σ = 1143920520. Its totient is φ = 1118499888.

The previous prime is 1131210193. The next prime is 1131210247. The reversal of 1131210203 is 3020121311.

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

It is a cyclic number.

It is not a de Polignac number, because 1131210203 - 2²² = 1127015899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131210103) 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, 6355025 + ... + 6355202.

It is an arithmetic number, because the mean of its divisors is an integer number (285980130).

Almost surely, 2^1131210203 is an apocalyptic number.

1131210203 is a deficient number, since it is larger than the sum of its proper divisors (12710317).

1131210203 is an equidigital number, since it uses as much as digits as its factorization.

1131210203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12710316.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1131210203 is about 33633.4684949382. The cubic root of 1131210203 is about 1041.9521405634.

Adding to 1131210203 its reverse (3020121311), we get a palindrome (4151331514).

The spelling of 1131210203 in words is "one billion, one hundred thirty-one million, two hundred ten thousand, two hundred three".