1111112122212 has 36 divisors (see below), whose sum is σ = 2809280229756. Its totient is φ = 370286879040.

The previous prime is 1111112122193. The next prime is 1111112122279. The reversal of 1111112122212 is 2122212111111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 518667874596 + 592444247616 = 720186^2 + 769704^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 3331483 + ... + 3649794.

Almost surely, 2^{1111112122212} is an apocalyptic number.

1111112122212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1111112122212 is an abundant number, since it is smaller than the sum of its proper divisors (1698168107544).

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

1111112122212 is a wasteful number, since it uses less digits than its factorization.

1111112122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6985708 (or 6985703 counting only the distinct ones).

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

Adding to 1111112122212 its reverse (2122212111111), we get a palindrome (3233324233323).

The spelling of 1111112122212 in words is "one trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty-two thousand, two hundred twelve".