1131121203 has 32 divisors (see below), whose sum is σ = 1561317120. Its totient is φ = 728133120.

The previous prime is 1131121193. The next prime is 1131121207. The reversal of 1131121203 is 3021211311.

It is a happy number.

It is not a de Polignac number, because 1131121203 - 2⁶ = 1131121139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131121207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2553100 + ... + 2553542.

It is an arithmetic number, because the mean of its divisors is an integer number (48791160).

Almost surely, 2^1131121203 is an apocalyptic number.

1131121203 is a deficient number, since it is larger than the sum of its proper divisors (430195917).

1131121203 is a wasteful number, since it uses less digits than its factorization.

1131121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1131121203 is about 33632.1453820597. The cubic root of 1131121203 is about 1041.9248140263.

Adding to 1131121203 its reverse (3021211311), we get a palindrome (4152332514).

The spelling of 1131121203 in words is "one billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred three".