221120322212 has 6 divisors (see below), whose sum is σ = 386960563878. Its totient is φ = 110560161104.

The previous prime is 221120322133. The next prime is 221120322233. The reversal of 221120322212 is 212223021122.

It can be written as a sum of positive squares in only one way, i.e., 196341154816 + 24779167396 = 443104^2 + 157414^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27640040273 + ... + 27640040280.

It is an arithmetic number, because the mean of its divisors is an integer number (64493427313).

Almost surely, 2^221120322212 is an apocalyptic number.

It is an amenable number.

221120322212 is a deficient number, since it is larger than the sum of its proper divisors (165840241666).

221120322212 is a wasteful number, since it uses less digits than its factorization.

221120322212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55280080557 (or 55280080555 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 221120322212 its reverse (212223021122), we get a palindrome (433343343334).

The spelling of 221120322212 in words is "two hundred twenty-one billion, one hundred twenty million, three hundred twenty-two thousand, two hundred twelve".