2112210023221 has 2 divisors, whose sum is σ = 2112210023222. Its totient is φ = 2112210023220.

The previous prime is 2112210023201. The next prime is 2112210023251. The reversal of 2112210023221 is 1223200122112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1897272082225 + 214937940996 = 1377415^2 + 463614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112210023221 - 2⁷ = 2112210023093 is a prime.

It is a super-2 number, since 2×2112210023221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112210023201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056105011610 + 1056105011611.

It is an arithmetic number, because the mean of its divisors is an integer number (1056105011611).

Almost surely, 2^{2112210023221} is an apocalyptic number.

It is an amenable number.

2112210023221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112210023221 is an equidigital number, since it uses as much as digits as its factorization.

2112210023221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2112210023221 its reverse (1223200122112), we get a palindrome (3335410145333).

The spelling of 2112210023221 in words is "two trillion, one hundred twelve billion, two hundred ten million, twenty-three thousand, two hundred twenty-one".