2221222221212 has 12 divisors (see below), whose sum is σ = 3887149748496. Its totient is φ = 1110608007360.

The previous prime is 2221222221191. The next prime is 2221222221233. The reversal of 2221222221212 is 2121222221222.

It is an interprime number because it is at equal distance from previous prime (2221222221191) and next prime (2221222221233).

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

It is a congruent number.

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, 1744148 + ... + 2735780.

It is an arithmetic number, because the mean of its divisors is an integer number (323929145708).

Almost surely, 2^{2221222221212} is an apocalyptic number.

It is an amenable number.

2221222221212 is a deficient number, since it is larger than the sum of its proper divisors (1665927527284).

2221222221212 is a wasteful number, since it uses less digits than its factorization.

2221222221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551628 (or 1551626 counting only the distinct ones).

The product of its digits is 1024, while the sum is 23.

Adding to 2221222221212 its reverse (2121222221222), we get a palindrome (4342444442434).

The spelling of 2221222221212 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twelve".