11220211211212 has 24 divisors (see below), whose sum is σ = 19831568558256. Its totient is φ = 5554161220608.

The previous prime is 11220211211203. The next prime is 11220211211269. The reversal of 11220211211212 is 21211211202211.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11220211211212.

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, 13657213 + ... + 14455444.

It is an arithmetic number, because the mean of its divisors is an integer number (826315356594).

Almost surely, 2^{11220211211212} is an apocalyptic number.

It is an amenable number.

11220211211212 is a deficient number, since it is larger than the sum of its proper divisors (8611357347044).

11220211211212 is a wasteful number, since it uses less digits than its factorization.

11220211211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28113657 (or 28113655 counting only the distinct ones).

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

Adding to 11220211211212 its reverse (21211211202211), we get a palindrome (32431422413423).

Subtracting 11220211211212 from its reverse (21211211202211), we obtain a palindrome (9990999990999).

The spelling of 11220211211212 in words is "eleven trillion, two hundred twenty billion, two hundred eleven million, two hundred eleven thousand, two hundred twelve".