11551322012 has 12 divisors (see below), whose sum is σ = 20216270256. Its totient is φ = 5775244800.

The previous prime is 11551322011. The next prime is 11551322047. The reversal of 11551322012 is 21022315511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551322011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36773 + ... + 156380.

It is an arithmetic number, because the mean of its divisors is an integer number (1684689188).

Almost surely, 2^11551322012 is an apocalyptic number.

It is an amenable number.

11551322012 is a deficient number, since it is larger than the sum of its proper divisors (8664948244).

11551322012 is a wasteful number, since it uses less digits than its factorization.

11551322012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208108 (or 208106 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 11551322012 its reverse (21022315511), we get a palindrome (32573637523).

The spelling of 11551322012 in words is "eleven billion, five hundred fifty-one million, three hundred twenty-two thousand, twelve".