221222112210012 has 48 divisors (see below), whose sum is σ = 530224515529632. Its totient is φ = 71735715267840.

The previous prime is 221222112210007. The next prime is 221222112210061. The reversal of 221222112210012 is 210012211222122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38997003 + ... + 44308130.

It is an arithmetic number, because the mean of its divisors is an integer number (11046344073534).

Almost surely, 2^{221222112210012} is an apocalyptic number.

It is an amenable number.

221222112210012 is an abundant number, since it is smaller than the sum of its proper divisors (309002403319620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221222112210012 is a wasteful number, since it uses less digits than its factorization.

221222112210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83311158 (or 83311156 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221222112210012 its reverse (210012211222122), we get a palindrome (431234323432134).

The spelling of 221222112210012 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred twelve million, two hundred ten thousand, twelve".