11131212032 has 18 divisors (see below), whose sum is σ = 22218943278. Its totient is φ = 5565605888.

The previous prime is 11131212023. The next prime is 11131212047. The reversal of 11131212032 is 23021213111.

It can be written as a sum of positive squares in only one way, i.e., 8002375936 + 3128836096 = 89456^2 + 55936^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11131212032.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21740393 + ... + 21740904.

Almost surely, 2^11131212032 is an apocalyptic number.

It is an amenable number.

11131212032 is a deficient number, since it is larger than the sum of its proper divisors (11087731246).

11131212032 is an frugal number, since it uses more digits than its factorization.

11131212032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43481313 (or 43481299 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11131212032 its reverse (23021213111), we get a palindrome (34152425143).

The spelling of 11131212032 in words is "eleven billion, one hundred thirty-one million, two hundred twelve thousand, thirty-two".