222121122212 has 48 divisors (see below), whose sum is σ = 426596577792. Its totient is φ = 100359060480.

The previous prime is 222121122193. The next prime is 222121122233. The reversal of 222121122212 is 212221121222.

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 15 ways as a sum of consecutive naturals, for example, 6586658 + ... + 6620294.

It is an arithmetic number, because the mean of its divisors is an integer number (8887428704).

Almost surely, 2^222121122212 is an apocalyptic number.

222121122212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

222121122212 is a deficient number, since it is larger than the sum of its proper divisors (204475455580).

222121122212 is a wasteful number, since it uses less digits than its factorization.

222121122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34548 (or 34546 counting only the distinct ones).

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

Adding to 222121122212 its reverse (212221121222), we get a palindrome (434342243434).

The spelling of 222121122212 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twelve".