221212222020112 has 40 divisors (see below), whose sum is σ = 428748026720472. Its totient is φ = 110567576371200.

The previous prime is 221212222020079. The next prime is 221212222020133. The reversal of 221212222020112 is 211020222212122.

221212222020112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 401656807696 + 220810565212416 = 633764^2 + 14859696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569674662 + ... + 570062842.

Almost surely, 2^{221212222020112} is an apocalyptic number.

It is an amenable number.

221212222020112 is a deficient number, since it is larger than the sum of its proper divisors (207535804700360).

221212222020112 is a wasteful number, since it uses less digits than its factorization.

221212222020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400507 (or 400501 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221212222020112 its reverse (211020222212122), we get a palindrome (432232444232234).

The spelling of 221212222020112 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred twenty-two million, twenty thousand, one hundred twelve".