221222010101212 has 24 divisors (see below), whose sum is σ = 394584021548640. Its totient is φ = 108499534489920.

The previous prime is 221222010101171. The next prime is 221222010101221. The reversal of 221222010101212 is 212101010222122.

It is a self number, because there is not a number n which added to its sum of digits gives 221222010101212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1976976387 + ... + 1977088282.

It is an arithmetic number, because the mean of its divisors is an integer number (16441000897860).

Almost surely, 2^{221222010101212} is an apocalyptic number.

It is an amenable number.

221222010101212 is a deficient number, since it is larger than the sum of its proper divisors (173362011447428).

221222010101212 is a wasteful number, since it uses less digits than its factorization.

221222010101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954064941 (or 3954064939 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221222010101212 its reverse (212101010222122), we get a palindrome (433323020323334).

The spelling of 221222010101212 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, ten million, one hundred one thousand, two hundred twelve".