1131220204 has 12 divisors (see below), whose sum is σ = 1986002928. Its totient is φ = 563790800.

The previous prime is 1131220199. The next prime is 1131220241. The reversal of 1131220204 is 4020221311.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453427 + ... + 455914.

It is an arithmetic number, because the mean of its divisors is an integer number (165500244).

Almost surely, 2^1131220204 is an apocalyptic number.

It is an amenable number.

1131220204 is a deficient number, since it is larger than the sum of its proper divisors (854782724).

1131220204 is a wasteful number, since it uses less digits than its factorization.

1131220204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909656 (or 909654 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1131220204 is about 33633.6171709199. The cubic root of 1131220204 is about 1041.9552111782.

Adding to 1131220204 its reverse (4020221311), we get a palindrome (5151441515).

The spelling of 1131220204 in words is "one billion, one hundred thirty-one million, two hundred twenty thousand, two hundred four".