212121222122222 has 64 divisors (see below), whose sum is σ = 409304108482560. Its totient is φ = 80255707200000.

The previous prime is 212121222122221. The next prime is 212121222122233. The reversal of 212121222122222 is 222221222121212.

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 = 212121222122191 and 212121222122200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121222122221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 231764654 + ... + 232678097.

It is an arithmetic number, because the mean of its divisors is an integer number (6395376695040).

Almost surely, 2^{212121222122222} is an apocalyptic number.

212121222122222 is a deficient number, since it is larger than the sum of its proper divisors (197182886360338).

212121222122222 is a wasteful number, since it uses less digits than its factorization.

212121222122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464442897.

The product of its digits is 2048, while the sum is 26.

Adding to 212121222122222 its reverse (222221222121212), we get a palindrome (434342444243434).

The spelling of 212121222122222 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-two".