2221221010221 has 32 divisors (see below), whose sum is σ = 3465172300800. Its totient is φ = 1402358073840.

The previous prime is 2221221010207. The next prime is 2221221010301. The reversal of 2221221010221 is 1220101221222.

It is a happy number.

2221221010221 is a `hidden beast` number, since 2 + 221 + 2 + 210 + 10 + 221 = 666.

It is not a de Polignac number, because 2221221010221 - 2¹⁰ = 2221221009197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221221010194 and 2221221010203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221221010721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 592170 + ... + 2189316.

It is an arithmetic number, because the mean of its divisors is an integer number (108286634400).

Almost surely, 2^{2221221010221} is an apocalyptic number.

It is an amenable number.

2221221010221 is a deficient number, since it is larger than the sum of its proper divisors (1243951290579).

2221221010221 is a wasteful number, since it uses less digits than its factorization.

2221221010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599886 (or 1599880 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2221221010221 its reverse (1220101221222), we get a palindrome (3441322231443).

The spelling of 2221221010221 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-one million, ten thousand, two hundred twenty-one".