12001122312222 has 16 divisors (see below), whose sum is σ = 24008388066432. Its totient is φ = 3999350197080.

The previous prime is 12001122312199. The next prime is 12001122312229. The reversal of 12001122312222 is 22221322110021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001122312229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255951354 + ... + 255998237.

It is an arithmetic number, because the mean of its divisors is an integer number (1500524254152).

Almost surely, 2^{12001122312222} is an apocalyptic number.

12001122312222 is an abundant number, since it is smaller than the sum of its proper divisors (12007265754210).

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

12001122312222 is a wasteful number, since it uses less digits than its factorization.

12001122312222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511953503.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 12001122312222 its reverse (22221322110021), we get a palindrome (34222444422243).

The spelling of 12001122312222 in words is "twelve trillion, one billion, one hundred twenty-two million, three hundred twelve thousand, two hundred twenty-two".