11211232113 has 10 divisors (see below), whose sum is σ = 16747643154. Its totient is φ = 7474154688.

The previous prime is 11211232111. The next prime is 11211232121. The reversal of 11211232113 is 31123211211.

It can be written as a sum of positive squares in only one way, i.e., 6462230544 + 4749001569 = 80388^2 + 68913^2 .

It is not a de Polignac number, because 11211232113 - 2¹ = 11211232111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11211232111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 69205056 + ... + 69205217.

Almost surely, 2^11211232113 is an apocalyptic number.

It is an amenable number.

11211232113 is a deficient number, since it is larger than the sum of its proper divisors (5536411041).

11211232113 is an equidigital number, since it uses as much as digits as its factorization.

11211232113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138410285 (or 138410276 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11211232113 its reverse (31123211211), we get a palindrome (42334443324).

The spelling of 11211232113 in words is "eleven billion, two hundred eleven million, two hundred thirty-two thousand, one hundred thirteen".