12111033220551 has 12 divisors (see below), whose sum is σ = 17674062226912. Its totient is φ = 7990784804736.

The previous prime is 12111033220543. The next prime is 12111033220589. The reversal of 12111033220551 is 15502233011121.

12111033220551 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 103 + 3 + 2 + 2 + 0 + 551 = 666.

It is not a de Polignac number, because 12111033220551 - 2³ = 12111033220543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111033220541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6936444271 + ... + 6936446016.

Almost surely, 2^{12111033220551} is an apocalyptic number.

12111033220551 is a deficient number, since it is larger than the sum of its proper divisors (5563029006361).

12111033220551 is a wasteful number, since it uses less digits than its factorization.

12111033220551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13872890390 (or 13872890387 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 12111033220551 its reverse (15502233011121), we get a palindrome (27613266231672).

The spelling of 12111033220551 in words is "twelve trillion, one hundred eleven billion, thirty-three million, two hundred twenty thousand, five hundred fifty-one".