222123012012 has 216 divisors, whose sum is σ = 646604614656. Its totient is φ = 64163880000.

The previous prime is 222123011987. The next prime is 222123012019. The reversal of 222123012012 is 210210321222.

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 (222123012019) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9035137 + ... + 9059687.

Almost surely, 2^222123012012 is an apocalyptic number.

222123012012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222123012012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323302307328).

222123012012 is an abundant number, since it is smaller than the sum of its proper divisors (424481602644).

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

222123012012 is a wasteful number, since it uses less digits than its factorization.

222123012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24681 (or 24665 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 222123012012 its reverse (210210321222), we get a palindrome (432333333234).

The spelling of 222123012012 in words is "two hundred twenty-two billion, one hundred twenty-three million, twelve thousand, twelve".