11220220212 has 12 divisors (see below), whose sum is σ = 26180513856. Its totient is φ = 3740073400.

The previous prime is 11220220211. The next prime is 11220220261. The reversal of 11220220212 is 21202202211.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 11220220191 and 11220220200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220220211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467509164 + ... + 467509187.

It is an arithmetic number, because the mean of its divisors is an integer number (2181709488).

Almost surely, 2^11220220212 is an apocalyptic number.

11220220212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11220220212 is an abundant number, since it is smaller than the sum of its proper divisors (14960293644).

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

11220220212 is a wasteful number, since it uses less digits than its factorization.

11220220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935018358 (or 935018356 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 11220220212 its reverse (21202202211), we get a palindrome (32422422423).

The spelling of 11220220212 in words is "eleven billion, two hundred twenty million, two hundred twenty thousand, two hundred twelve".