221102202212 has 6 divisors (see below), whose sum is σ = 386928853878. Its totient is φ = 110551101104.

The previous prime is 221102202163. The next prime is 221102202271. The reversal of 221102202212 is 212202201122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 195067088896 + 26035113316 = 441664^2 + 161354^2 .

It is a super-2 number, since 2×221102202212² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27637775273 + ... + 27637775280.

It is an arithmetic number, because the mean of its divisors is an integer number (64488142313).

Almost surely, 2^221102202212 is an apocalyptic number.

It is an amenable number.

221102202212 is a deficient number, since it is larger than the sum of its proper divisors (165826651666).

221102202212 is a wasteful number, since it uses less digits than its factorization.

221102202212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55275550557 (or 55275550555 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221102202212 its reverse (212202201122), we get a palindrome (433304403334).

The spelling of 221102202212 in words is "two hundred twenty-one billion, one hundred two million, two hundred two thousand, two hundred twelve".