2121221222212 has 12 divisors (see below), whose sum is σ = 3712437099280. Its totient is φ = 1060524908136.

The previous prime is 2121221222129. The next prime is 2121221222233. The reversal of 2121221222212 is 2122221221212.

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 3 ways as a sum of consecutive naturals, for example, 21370038 + ... + 21469069.

Almost surely, 2^{2121221222212} is an apocalyptic number.

It is an amenable number.

2121221222212 is a deficient number, since it is larger than the sum of its proper divisors (1591215877068).

2121221222212 is a wasteful number, since it uses less digits than its factorization.

2121221222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42851490 (or 42851488 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

Adding to 2121221222212 its reverse (2122221221212), we get a palindrome (4243442443424).

The spelling of 2121221222212 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".