2221112020221 has 12 divisors (see below), whose sum is σ = 3240037997820. Its totient is φ = 1466080540800.

The previous prime is 2221112020181. The next prime is 2221112020229. The reversal of 2221112020221 is 1220202111222.

It is a happy number.

2221112020221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1139534900100 + 1081577120121 = 1067490^2 + 1039989^2 .

It is not a de Polignac number, because 2221112020221 - 2⁶ = 2221112020157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221112020194 and 2221112020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221112020229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1221732876 + ... + 1221734693.

It is an arithmetic number, because the mean of its divisors is an integer number (270003166485).

Almost surely, 2^{2221112020221} is an apocalyptic number.

It is an amenable number.

2221112020221 is a deficient number, since it is larger than the sum of its proper divisors (1018925977599).

2221112020221 is a wasteful number, since it uses less digits than its factorization.

2221112020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443467676 (or 2443467673 counting only the distinct ones).

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

Adding to 2221112020221 its reverse (1220202111222), we get a palindrome (3441314131443).

The spelling of 2221112020221 in words is "two trillion, two hundred twenty-one billion, one hundred twelve million, twenty thousand, two hundred twenty-one".