11222220212 has 48 divisors (see below), whose sum is σ = 23181403392. Its totient is φ = 4654091520.

The previous prime is 11222220209. The next prime is 11222220223. The reversal of 11222220212 is 21202222211.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56537 + ... + 160127.

It is an arithmetic number, because the mean of its divisors is an integer number (482945904).

Almost surely, 2^11222220212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11222220212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11590701696).

11222220212 is an abundant number, since it is smaller than the sum of its proper divisors (11959183180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11222220212 is a wasteful number, since it uses less digits than its factorization.

11222220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103728 (or 103726 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 11222220212 its reverse (21202222211), we get a palindrome (32424442423).

The spelling of 11222220212 in words is "eleven billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twelve".