2212212220 has 48 divisors (see below), whose sum is σ = 5014820160. Its totient is φ = 817220096.

The previous prime is 2212212181. The next prime is 2212212229. The reversal of 2212212220 is 222122122.

It is a junction number, because it is equal to n+sod(n) for n = 2212212194 and 2212212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212212229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69577 + ... + 96256.

It is an arithmetic number, because the mean of its divisors is an integer number (104475420).

Almost surely, 2^2212212220 is an apocalyptic number.

2212212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2212212220 is an abundant number, since it is smaller than the sum of its proper divisors (2802607940).

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

2212212220 is a wasteful number, since it uses less digits than its factorization.

2212212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165894 (or 165892 counting only the distinct ones).

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

The square root of 2212212220 is about 47034.1601392010. The cubic root of 2212212220 is about 1302.9935392883.

Adding to 2212212220 its reverse (222122122), we get a palindrome (2434334342).

The spelling of 2212212220 in words is "two billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty".