221311002212 has 6 divisors (see below), whose sum is σ = 387294253878. Its totient is φ = 110655501104.

The previous prime is 221311002191. The next prime is 221311002239. The reversal of 221311002212 is 212200113122.

221311002212 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 only one way, i.e., 220659425536 + 651576676 = 469744^2 + 25526^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27663875273 + ... + 27663875280.

It is an arithmetic number, because the mean of its divisors is an integer number (64549042313).

Almost surely, 2^221311002212 is an apocalyptic number.

It is an amenable number.

221311002212 is a deficient number, since it is larger than the sum of its proper divisors (165983251666).

221311002212 is a wasteful number, since it uses less digits than its factorization.

221311002212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55327750557 (or 55327750555 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221311002212 its reverse (212200113122), we get a palindrome (433511115334).

The spelling of 221311002212 in words is "two hundred twenty-one billion, three hundred eleven million, two thousand, two hundred twelve".