11112112111212 has 216 divisors, whose sum is σ = 33120646374816. Its totient is φ = 3131818131456.

The previous prime is 11112112111187. The next prime is 11112112111241. The reversal of 11112112111212 is 21211121121111.

It is a super-2 number, since 2×11112112111212² (a number of 27 digits) contains 22 as substring.

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

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 46575858 + ... + 46813830.

Almost surely, 2^{11112112111212} is an apocalyptic number.

11112112111212 is a gapful number since it is divisible by the number (12) 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 11112112111212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16560323187408).

11112112111212 is an abundant number, since it is smaller than the sum of its proper divisors (22008534263604).

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

11112112111212 is a wasteful number, since it uses less digits than its factorization.

11112112111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238357 (or 238345 counting only the distinct ones).

The product of its digits is 16, while the sum is 18.

Adding to 11112112111212 its reverse (21211121121111), we get a palindrome (32323233232323).

The spelling of 11112112111212 in words is "eleven trillion, one hundred twelve billion, one hundred twelve million, one hundred eleven thousand, two hundred twelve".