222121220121212 has 12 divisors (see below), whose sum is σ = 388712272482240. Its totient is φ = 111060570840576.

The previous prime is 222121220121181. The next prime is 222121220121257. The reversal of 222121220121212 is 212121022121222.

It is a congruent number.

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, 5641589 + ... + 21819027.

It is an arithmetic number, because the mean of its divisors is an integer number (32392689373520).

Almost surely, 2^{222121220121212} is an apocalyptic number.

It is an amenable number.

222121220121212 is a deficient number, since it is larger than the sum of its proper divisors (166591052361028).

222121220121212 is a wasteful number, since it uses less digits than its factorization.

222121220121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19610020 (or 19610018 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222121220121212 its reverse (212121022121222), we get a palindrome (434242242242434).

The spelling of 222121220121212 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twelve".