11222112221212 has 24 divisors (see below), whose sum is σ = 19793681800704. Its totient is φ = 5566776126912.

The previous prime is 11222112221167. The next prime is 11222112221233. The reversal of 11222112221212 is 21212221122211.

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 7 ways as a sum of consecutive naturals, for example, 34686258 + ... + 35008294.

It is an arithmetic number, because the mean of its divisors is an integer number (824736741696).

Almost surely, 2^{11222112221212} is an apocalyptic number.

It is an amenable number.

11222112221212 is a deficient number, since it is larger than the sum of its proper divisors (8571569579492).

11222112221212 is a wasteful number, since it uses less digits than its factorization.

11222112221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390765 (or 390763 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

Adding to 11222112221212 its reverse (21212221122211), we get a palindrome (32434333343423).

The spelling of 11222112221212 in words is "eleven trillion, two hundred twenty-two billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twelve".