6221212212 has 24 divisors (see below), whose sum is σ = 14691057696. Its totient is φ = 2048752288.

The previous prime is 6221212189. The next prime is 6221212213. The reversal of 6221212212 is 2122121226.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221212213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3122103 + ... + 3124094.

It is an arithmetic number, because the mean of its divisors is an integer number (612127404).

Almost surely, 2^6221212212 is an apocalyptic number.

It is an amenable number.

6221212212 is an abundant number, since it is smaller than the sum of its proper divisors (8469845484).

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

6221212212 is a wasteful number, since it uses less digits than its factorization.

6221212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6246287 (or 6246285 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 6221212212 is about 78874.6614065633. The cubic root of 6221212212 is about 1839.1832595252.

Adding to 6221212212 its reverse (2122121226), we get a palindrome (8343333438).

The spelling of 6221212212 in words is "six billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twelve".