1210221222221 has 8 divisors (see below), whose sum is σ = 1326057377184. Its totient is φ = 1095354407920.

The previous prime is 1210221222193. The next prime is 1210221222251. The reversal of 1210221222221 is 1222221220121.

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 1210221222221 - 2⁶ = 1210221222157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210221222193 and 1210221222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210221222251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242332550 + ... + 242337543.

It is an arithmetic number, because the mean of its divisors is an integer number (165757172148).

Almost surely, 2^{1210221222221} is an apocalyptic number.

1210221222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210221222221 is a deficient number, since it is larger than the sum of its proper divisors (115836154963).

1210221222221 is a wasteful number, since it uses less digits than its factorization.

1210221222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484670331.

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

Adding to 1210221222221 its reverse (1222221220121), we get a palindrome (2432442442342).

The spelling of 1210221222221 in words is "one trillion, two hundred ten billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".