2221212121222 has 8 divisors (see below), whose sum is σ = 3332169927576. Its totient is φ = 1110488812032.

The previous prime is 2221212121213. The next prime is 2221212121253.

2221212121222 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a junction number, because it is equal to n+sod(n) for n = 2221212121193 and 2221212121202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58600608 + ... + 58638499.

It is an arithmetic number, because the mean of its divisors is an integer number (416521240947).

Almost surely, 2^{2221212121222} is an apocalyptic number.

2221212121222 is a deficient number, since it is larger than the sum of its proper divisors (1110957806354).

2221212121222 is a wasteful number, since it uses less digits than its factorization.

2221212121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117248582.

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

Multiplying 2221212121222 by its sum of digits (22), we get a palindrome (48866666666884).

The spelling of 2221212121222 in words is "two trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twenty-two".