11010212111221 has 16 divisors (see below), whose sum is σ = 11861256816640. Its totient is φ = 10186406521200.

The previous prime is 11010212111209. The next prime is 11010212111233. The reversal of 11010212111221 is 12211121201011.

It is an interprime number because it is at equal distance from previous prime (11010212111209) and next prime (11010212111233).

It is a cyclic number.

It is not a de Polignac number, because 11010212111221 - 2¹¹ = 11010212109173 is a prime.

It is a super-2 number, since 2×11010212111221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11010212111195 and 11010212111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11010212111281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3628636 + ... + 5931898.

It is an arithmetic number, because the mean of its divisors is an integer number (741328551040).

Almost surely, 2^{11010212111221} is an apocalyptic number.

It is an amenable number.

11010212111221 is a deficient number, since it is larger than the sum of its proper divisors (851044705419).

11010212111221 is a wasteful number, since it uses less digits than its factorization.

11010212111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309176.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11010212111221 its reverse (12211121201011), we get a palindrome (23221333312232).

The spelling of 11010212111221 in words is "eleven trillion, ten billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty-one".