2221111012221 has 16 divisors (see below), whose sum is σ = 3301047736320. Its totient is φ = 1476009868320.

The previous prime is 2221111012139. The next prime is 2221111012223. The reversal of 2221111012221 is 1222101111222.

It is not a de Polignac number, because 2221111012221 - 2¹⁹ = 2221110487933 is a prime.

It is a super-2 number, since 2×2221111012221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221111012194 and 2221111012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221111012223) 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, 131402685 + ... + 131419586.

It is an arithmetic number, because the mean of its divisors is an integer number (206315483520).

Almost surely, 2^{2221111012221} is an apocalyptic number.

It is an amenable number.

2221111012221 is a deficient number, since it is larger than the sum of its proper divisors (1079936724099).

2221111012221 is a wasteful number, since it uses less digits than its factorization.

2221111012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262822593 (or 262822587 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2221111012221 its reverse (1222101111222), we get a palindrome (3443212123443).

Subtracting from 2221111012221 its reverse (1222101111222), we obtain a palindrome (999009900999).

The spelling of 2221111012221 in words is "two trillion, two hundred twenty-one billion, one hundred eleven million, twelve thousand, two hundred twenty-one".