1210002211221 has 16 divisors (see below), whose sum is σ = 1615300392960. Its totient is φ = 805686417200.

The previous prime is 1210002211219. The next prime is 1210002211277. The reversal of 1210002211221 is 1221122000121.

It is a cyclic number.

It is not a de Polignac number, because 1210002211221 - 2¹ = 1210002211219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1210002211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210002211211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15741760 + ... + 15818438.

It is an arithmetic number, because the mean of its divisors is an integer number (100956274560).

Almost surely, 2^{1210002211221} is an apocalyptic number.

It is an amenable number.

1210002211221 is a deficient number, since it is larger than the sum of its proper divisors (405298181739).

1210002211221 is an equidigital number, since it uses as much as digits as its factorization.

1210002211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83016.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1210002211221 its reverse (1221122000121), we get a palindrome (2431124211342).

The spelling of 1210002211221 in words is "one trillion, two hundred ten billion, two million, two hundred eleven thousand, two hundred twenty-one".