11111222102212 has 6 divisors (see below), whose sum is σ = 19444638678878. Its totient is φ = 5555611051104.

The previous prime is 11111222102203. The next prime is 11111222102249. The reversal of 11111222102212 is 21220122211111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6266090342656 + 4845131759556 = 2503216^2 + 2201166^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11111222102212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388902762773 + ... + 1388902762780.

Almost surely, 2^{11111222102212} is an apocalyptic number.

It is an amenable number.

11111222102212 is a deficient number, since it is larger than the sum of its proper divisors (8333416576666).

11111222102212 is a wasteful number, since it uses less digits than its factorization.

11111222102212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777805525557 (or 2777805525555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11111222102212 its reverse (21220122211111), we get a palindrome (32331344313323).

The spelling of 11111222102212 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-two million, one hundred two thousand, two hundred twelve".