11220111212 has 6 divisors (see below), whose sum is σ = 19635194628. Its totient is φ = 5610055604.

The previous prime is 11220111191. The next prime is 11220111239. The reversal of 11220111212 is 21211102211.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402513898 + ... + 1402513905.

It is an arithmetic number, because the mean of its divisors is an integer number (3272532438).

Almost surely, 2^11220111212 is an apocalyptic number.

It is an amenable number.

11220111212 is a deficient number, since it is larger than the sum of its proper divisors (8415083416).

11220111212 is a wasteful number, since it uses less digits than its factorization.

11220111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805027807 (or 2805027805 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11220111212 its reverse (21211102211), we get a palindrome (32431213423).

Subtracting 11220111212 from its reverse (21211102211), we obtain a palindrome (9990990999).

The spelling of 11220111212 in words is "eleven billion, two hundred twenty million, one hundred eleven thousand, two hundred twelve".