1301220211 has 4 divisors (see below), whose sum is σ = 1301438512. Its totient is φ = 1301001912.

The previous prime is 1301220209. The next prime is 1301220241. The reversal of 1301220211 is 1120221031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1301220211 - 2¹ = 1301220209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1301220191 and 1301220200.

It is not an unprimeable number, because it can be changed into a prime (1301220241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99951 + ... + 112216.

It is an arithmetic number, because the mean of its divisors is an integer number (325359628).

Almost surely, 2^1301220211 is an apocalyptic number.

1301220211 is a deficient number, since it is larger than the sum of its proper divisors (218301).

1301220211 is an equidigital number, since it uses as much as digits as its factorization.

1301220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218300.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1301220211 is about 36072.4300678510. The cubic root of 1301220211 is about 1091.7342454083.

Adding to 1301220211 its reverse (1120221031), we get a palindrome (2421441242).

The spelling of 1301220211 in words is "one billion, three hundred one million, two hundred twenty thousand, two hundred eleven".