2011201202221 has 2 divisors, whose sum is σ = 2011201202222. Its totient is φ = 2011201202220.

The previous prime is 2011201202201. The next prime is 2011201202237. The reversal of 2011201202221 is 1222021021102.

It is a happy number.

It is an a-pointer prime, because the next prime (2011201202237) can be obtained adding 2011201202221 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1617462522025 + 393738680196 = 1271795^2 + 627486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011201202221 - 2¹⁷ = 2011201071149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011201202195 and 2011201202204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011201202201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005600601110 + 1005600601111.

It is an arithmetic number, because the mean of its divisors is an integer number (1005600601111).

Almost surely, 2^{2011201202221} is an apocalyptic number.

It is an amenable number.

2011201202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011201202221 is an equidigital number, since it uses as much as digits as its factorization.

2011201202221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2011201202221 its reverse (1222021021102), we get a palindrome (3233222223323).

The spelling of 2011201202221 in words is "two trillion, eleven billion, two hundred one million, two hundred two thousand, two hundred twenty-one".