1210322221 has 8 divisors (see below), whose sum is σ = 1252609920.
Its totient is φ = 1168071408.
The previous prime is 1210322209. The next prime is 1210322227. The reversal of 1210322221 is 1222230121.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 1210322221 - 27 = 1210322093 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 1210322195 and 1210322204.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1210322227) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68880 + ... + 84646.
It is an arithmetic number, because the mean of its divisors is an integer number (156576240).
Almost surely, 21210322221 is an apocalyptic number.
It is an amenable number.
1210322221 is a deficient number, since it is larger than the sum of its proper divisors (42287699).
1210322221 is a wasteful number, since it uses less digits than its factorization.
1210322221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 18443.
The product of its (nonzero) digits is 96, while the sum is 16.
The square root of 1210322221 is about 34789.6855547733.
The cubic root of 1210322221 is about 1065.6968177430.
Adding to 1210322221 its reverse (1222230121), we get a palindrome (2432552342).
The spelling of 1210322221 in words is "one billion, two hundred ten million, three hundred twenty-two thousand, two hundred twenty-one".