211220221301 has 2 divisors, whose sum is σ = 211220221302. Its totient is φ = 211220221300.

The previous prime is 211220221259. The next prime is 211220221327. The reversal of 211220221301 is 103122022112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139165556401 + 72054664900 = 373049^2 + 268430^2 .

It is a cyclic number.

It is not a de Polignac number, because 211220221301 - 2¹⁸ = 211219959157 is a prime.

It is a super-2 number, since 2×211220221301² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211220221301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211220221391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610110650 + 105610110651.

It is an arithmetic number, because the mean of its divisors is an integer number (105610110651).

Almost surely, 2^211220221301 is an apocalyptic number.

It is an amenable number.

211220221301 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220221301 is an equidigital number, since it uses as much as digits as its factorization.

211220221301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211220221301 its reverse (103122022112), we get a palindrome (314342243413).

The spelling of 211220221301 in words is "two hundred eleven billion, two hundred twenty million, two hundred twenty-one thousand, three hundred one".