10112210211221 has 4 divisors (see below), whose sum is σ = 10112562962700. Its totient is φ = 10111857459744.

The previous prime is 10112210211199. The next prime is 10112210211239. The reversal of 10112210211221 is 12211201221101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6264453346321 + 3847756864900 = 2502889^2 + 1961570^2 .

It is a cyclic number.

It is not a de Polignac number, because 10112210211221 - 2¹⁰ = 10112210210197 is a prime.

It is a super-2 number, since 2×10112210211221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10112210211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10112210211251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176332736 + ... + 176390073.

It is an arithmetic number, because the mean of its divisors is an integer number (2528140740675).

Almost surely, 2^{10112210211221} is an apocalyptic number.

It is an amenable number.

10112210211221 is a deficient number, since it is larger than the sum of its proper divisors (352751479).

10112210211221 is an equidigital number, since it uses as much as digits as its factorization.

10112210211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352751478.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10112210211221 its reverse (12211201221101), we get a palindrome (22323411432322).

The spelling of 10112210211221 in words is "ten trillion, one hundred twelve billion, two hundred ten million, two hundred eleven thousand, two hundred twenty-one".