1131121312 has 12 divisors (see below), whose sum is σ = 2226895146. Its totient is φ = 565560640.

The previous prime is 1131121267. The next prime is 1131121337. The reversal of 1131121312 is 2131211311.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1008443536 + 122677776 = 31756^2 + 11076^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17673739 + ... + 17673802.

Almost surely, 2^1131121312 is an apocalyptic number.

It is an amenable number.

1131121312 is a deficient number, since it is larger than the sum of its proper divisors (1095773834).

1131121312 is an equidigital number, since it uses as much as digits as its factorization.

1131121312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35347551 (or 35347543 counting only the distinct ones).

The product of its digits is 36, while the sum is 16.

The square root of 1131121312 is about 33632.1470025332. The cubic root of 1131121312 is about 1041.9248474945.

Adding to 1131121312 its reverse (2131211311), we get a palindrome (3262332623).

It can be divided in two parts, 11311 and 21312, that added together give a palindrome (32623).

The spelling of 1131121312 in words is "one billion, one hundred thirty-one million, one hundred twenty-one thousand, three hundred twelve".