11775222012 has 24 divisors (see below), whose sum is σ = 27479141200. Its totient is φ = 3924556416.

The previous prime is 11775221999. The next prime is 11775222029. The reversal of 11775222012 is 21022257711.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36414 + ... + 157722.

Almost surely, 2^11775222012 is an apocalyptic number.

11775222012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11775222012 is an abundant number, since it is smaller than the sum of its proper divisors (15703919188).

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

11775222012 is a wasteful number, since it uses less digits than its factorization.

11775222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129405 (or 129403 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

Adding to 11775222012 its reverse (21022257711), we get a palindrome (32797479723).

The spelling of 11775222012 in words is "eleven billion, seven hundred seventy-five million, two hundred twenty-two thousand, twelve".