2212121222212 has 72 divisors (see below), whose sum is σ = 4494920880800. Its totient is φ = 949220933760.

The previous prime is 2212121222197. The next prime is 2212121222279. The reversal of 2212121222212 is 2122221212122.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 2177464 + ... + 3027472.

Almost surely, 2^{2212121222212} is an apocalyptic number.

2212121222212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2212121222212 is an abundant number, since it is smaller than the sum of its proper divisors (2282799658588).

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

2212121222212 is a wasteful number, since it uses less digits than its factorization.

2212121222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850337 (or 850324 counting only the distinct ones).

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

Adding to 2212121222212 its reverse (2122221212122), we get a palindrome (4334342434334).

The spelling of 2212121222212 in words is "two trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".