12120111222222 has 16 divisors (see below), whose sum is σ = 24240696233040. Its totient is φ = 4039958109312.

The previous prime is 12120111222211. The next prime is 12120111222229. The reversal of 12120111222222 is 22222211102121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120111222229) 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, 19408203 + ... + 20022950.

It is an arithmetic number, because the mean of its divisors is an integer number (1515043514565).

Almost surely, 2^{12120111222222} is an apocalyptic number.

12120111222222 is an abundant number, since it is smaller than the sum of its proper divisors (12120585010818).

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

12120111222222 is a wasteful number, since it uses less digits than its factorization.

12120111222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39482387.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12120111222222 its reverse (22222211102121), we get a palindrome (34342322324343).

The spelling of 12120111222222 in words is "twelve trillion, one hundred twenty billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".