1213331136 has 28 divisors (see below), whose sum is σ = 3210272472. Its totient is φ = 404443648.

The previous prime is 1213331113. The next prime is 1213331137. The reversal of 1213331136 is 6311333121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1213331137) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3159525 + ... + 3159908.

Almost surely, 2^1213331136 is an apocalyptic number.

1213331136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1213331136 is an abundant number, since it is smaller than the sum of its proper divisors (1996941336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213331136 is an equidigital number, since it uses as much as digits as its factorization.

1213331136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6319448 (or 6319438 counting only the distinct ones).

The product of its digits is 972, while the sum is 24.

The square root of 1213331136 is about 34832.9030659232. The cubic root of 1213331136 is about 1066.5792101907.

Adding to 1213331136 its reverse (6311333121), we get a palindrome (7524664257).

The spelling of 1213331136 in words is "one billion, two hundred thirteen million, three hundred thirty-one thousand, one hundred thirty-six".