212222211212 has 72 divisors (see below), whose sum is σ = 421038717120. Its totient is φ = 93476416000.

The previous prime is 212222211209. The next prime is 212222211293. The reversal of 212222211212 is 212112222212.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2251364 + ... + 2343732.

It is an arithmetic number, because the mean of its divisors is an integer number (5847759960).

Almost surely, 2^212222211212 is an apocalyptic number.

212222211212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212222211212 is a deficient number, since it is larger than the sum of its proper divisors (208816505908).

212222211212 is a wasteful number, since it uses less digits than its factorization.

212222211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92543 (or 92530 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

Adding to 212222211212 its reverse (212112222212), we get a palindrome (424334433424).

The spelling of 212222211212 in words is "two hundred twelve billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twelve".