222220220121212 has 12 divisors (see below), whose sum is σ = 388889173763160. Its totient is φ = 111109027617456.

The previous prime is 222220220121157. The next prime is 222220220121227. The reversal of 222220220121212 is 212121022022222.

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, 270148787 + ... + 270970122.

It is an arithmetic number, because the mean of its divisors is an integer number (32407431146930).

Almost surely, 2^{222220220121212} is an apocalyptic number.

It is an amenable number.

222220220121212 is a deficient number, since it is larger than the sum of its proper divisors (166668953641948).

222220220121212 is a wasteful number, since it uses less digits than its factorization.

222220220121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541221580 (or 541221578 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 222220220121212 its reverse (212121022022222), we get a palindrome (434341242143434).

The spelling of 222220220121212 in words is "two hundred twenty-two trillion, two hundred twenty billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twelve".