2111001200221 has 2 divisors, whose sum is σ = 2111001200222. Its totient is φ = 2111001200220.

The previous prime is 2111001200219. The next prime is 2111001200257. The reversal of 2111001200221 is 1220021001112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1291089060121 + 819912140100 = 1136261^2 + 905490^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111001200221 - 2¹ = 2111001200219 is a prime.

Together with 2111001200219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111001200291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055500600110 + 1055500600111.

It is an arithmetic number, because the mean of its divisors is an integer number (1055500600111).

Almost surely, 2^{2111001200221} is an apocalyptic number.

It is an amenable number.

2111001200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111001200221 is an equidigital number, since it uses as much as digits as its factorization.

2111001200221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2111001200221 its reverse (1220021001112), we get a palindrome (3331022201333).

The spelling of 2111001200221 in words is "two trillion, one hundred eleven billion, one million, two hundred thousand, two hundred twenty-one".