12111033220550 has 192 divisors, whose sum is σ = 25071547550400. Its totient is φ = 4315975065600.

The previous prime is 12111033220543. The next prime is 12111033220589. The reversal of 12111033220550 is 5502233011121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2611822832 + ... + 2611827468.

It is an arithmetic number, because the mean of its divisors is an integer number (130580976825).

Almost surely, 2^{12111033220550} is an apocalyptic number.

12111033220550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111033220550 is an abundant number, since it is smaller than the sum of its proper divisors (12960514329850).

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

12111033220550 is a wasteful number, since it uses less digits than its factorization.

12111033220550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5211 (or 5206 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 12111033220550 its reverse (5502233011121), we get a palindrome (17613266231671).

The spelling of 12111033220550 in words is "twelve trillion, one hundred eleven billion, thirty-three million, two hundred twenty thousand, five hundred fifty".