221220102102212 has 24 divisors (see below), whose sum is σ = 390038829736920. Its totient is φ = 109782837665280.

The previous prime is 221220102102199. The next prime is 221220102102283. The reversal of 221220102102212 is 212201201022122.

It can be written as a sum of positive squares in 4 ways, for example, as 11842848526336 + 209377253575876 = 3441344^2 + 14469874^2 .

It is a super-2 number, since 2×221220102102212² (a number of 29 digits) contains 22 as substring.

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, 299781413 + ... + 300518444.

It is an arithmetic number, because the mean of its divisors is an integer number (16251617905705).

Almost surely, 2^{221220102102212} is an apocalyptic number.

It is an amenable number.

221220102102212 is a deficient number, since it is larger than the sum of its proper divisors (168818727634708).

221220102102212 is a wasteful number, since it uses less digits than its factorization.

221220102102212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600300551 (or 600300549 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221220102102212 its reverse (212201201022122), we get a palindrome (433421303124334).

The spelling of 221220102102212 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred two million, one hundred two thousand, two hundred twelve".