12212202220 has 12 divisors (see below), whose sum is σ = 25645624704. Its totient is φ = 4884880880.

The previous prime is 12212202181. The next prime is 12212202239. The reversal of 12212202220 is 2220221221.

It is a junction number, because it is equal to n+sod(n) for n = 12212202194 and 12212202203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305305036 + ... + 305305075.

It is an arithmetic number, because the mean of its divisors is an integer number (2137135392).

Almost surely, 2^12212202220 is an apocalyptic number.

12212202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212202220 is an abundant number, since it is smaller than the sum of its proper divisors (13433422484).

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

12212202220 is a wasteful number, since it uses less digits than its factorization.

12212202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610610120 (or 610610118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12212202220 its reverse (2220221221), we get a palindrome (14432423441).

The spelling of 12212202220 in words is "twelve billion, two hundred twelve million, two hundred two thousand, two hundred twenty".