2112100220221 has 2 divisors, whose sum is σ = 2112100220222. Its totient is φ = 2112100220220.

The previous prime is 2112100220173. The next prime is 2112100220249. The reversal of 2112100220221 is 1220220012112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1638220804900 + 473879415321 = 1279930^2 + 688389^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112100220221 - 2¹⁵ = 2112100187453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2112100220195 and 2112100220204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112100223221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056050110110 + 1056050110111.

It is an arithmetic number, because the mean of its divisors is an integer number (1056050110111).

Almost surely, 2^{2112100220221} is an apocalyptic number.

It is an amenable number.

2112100220221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112100220221 is an equidigital number, since it uses as much as digits as its factorization.

2112100220221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2112100220221 its reverse (1220220012112), we get a palindrome (3332320232333).

The spelling of 2112100220221 in words is "two trillion, one hundred twelve billion, one hundred million, two hundred twenty thousand, two hundred twenty-one".