12051555222 has 32 divisors (see below), whose sum is σ = 27553473792. Its totient is φ = 3442418784.

The previous prime is 12051555209. The next prime is 12051555223. The reversal of 12051555222 is 22255515021.

It is a self number, because there is not a number n which added to its sum of digits gives 12051555222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12051555223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138873 + ... + 208299.

It is an arithmetic number, because the mean of its divisors is an integer number (861046056).

Almost surely, 2^12051555222 is an apocalyptic number.

12051555222 is an abundant number, since it is smaller than the sum of its proper divisors (15501918570).

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

12051555222 is a wasteful number, since it uses less digits than its factorization.

12051555222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73572.

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 12051555222 in words is "twelve billion, fifty-one million, five hundred fifty-five thousand, two hundred twenty-two".