1212223112112 has 20 divisors (see below), whose sum is σ = 3131576373080. Its totient is φ = 404074370688.

The previous prime is 1212223112071. The next prime is 1212223112119. The reversal of 1212223112112 is 2112113222121.

It is a super-2 number, since 2×1212223112112² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1212223112119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12627324037 + ... + 12627324132.

It is an arithmetic number, because the mean of its divisors is an integer number (156578818654).

Almost surely, 2^{1212223112112} is an apocalyptic number.

1212223112112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212223112112 is an abundant number, since it is smaller than the sum of its proper divisors (1919353260968).

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

1212223112112 is a wasteful number, since it uses less digits than its factorization.

1212223112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25254648180 (or 25254648174 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

Adding to 1212223112112 its reverse (2112113222121), we get a palindrome (3324336334233).

The spelling of 1212223112112 in words is "one trillion, two hundred twelve billion, two hundred twenty-three million, one hundred twelve thousand, one hundred twelve".