11222111121212 has 12 divisors (see below), whose sum is σ = 19638728260536. Its totient is φ = 5611045903920.

The previous prime is 11222111121187. The next prime is 11222111121257. The reversal of 11222111121212 is 21212111122211.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625943 + ... + 4778705.

It is an arithmetic number, because the mean of its divisors is an integer number (1636560688378).

Almost surely, 2^{11222111121212} is an apocalyptic number.

It is an amenable number.

11222111121212 is a deficient number, since it is larger than the sum of its proper divisors (8416617139324).

11222111121212 is a wasteful number, since it uses less digits than its factorization.

11222111121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4828348 (or 4828346 counting only the distinct ones).

The product of its digits is 64, while the sum is 20.

Adding to 11222111121212 its reverse (21212111122211), we get a palindrome (32434222243423).

Subtracting 11222111121212 from its reverse (21212111122211), we obtain a palindrome (9990000000999).

The spelling of 11222111121212 in words is "eleven trillion, two hundred twenty-two billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twelve".