2111222112012 has 96 divisors (see below), whose sum is σ = 5898593218560. Its totient is φ = 649164559680.

The previous prime is 2111222112011. The next prime is 2111222112029. The reversal of 2111222112012 is 2102112221112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2111222112011) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1554163 + ... + 2576405.

It is an arithmetic number, because the mean of its divisors is an integer number (61443679360).

Almost surely, 2^{2111222112012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111222112012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2949296609280).

2111222112012 is an abundant number, since it is smaller than the sum of its proper divisors (3787371106548).

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

2111222112012 is a wasteful number, since it uses less digits than its factorization.

2111222112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023740 (or 1023732 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2111222112012 its reverse (2102112221112), we get a palindrome (4213334333124).

The spelling of 2111222112012 in words is "two trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, twelve".