11112210112212 has 144 divisors (see below), whose sum is σ = 31480104801600. Its totient is φ = 3275791372800.

The previous prime is 11112210112187. The next prime is 11112210112217. The reversal of 11112210112212 is 21221101221111.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112210112217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4685823 + ... + 6646905.

It is an arithmetic number, because the mean of its divisors is an integer number (218611838900).

Almost surely, 2^{11112210112212} is an apocalyptic number.

11112210112212 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 11112210112212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15740052400800).

11112210112212 is an abundant number, since it is smaller than the sum of its proper divisors (20367894689388).

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

11112210112212 is a wasteful number, since it uses less digits than its factorization.

11112210112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961494 (or 1961489 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11112210112212 its reverse (21221101221111), we get a palindrome (32333311333323).

The spelling of 11112210112212 in words is "eleven trillion, one hundred twelve billion, two hundred ten million, one hundred twelve thousand, two hundred twelve".