1301331221 has 2 divisors, whose sum is σ = 1301331222. Its totient is φ = 1301331220.

The previous prime is 1301331209. The next prime is 1301331233. The reversal of 1301331221 is 1221331031.

It is a balanced prime because it is at equal distance from previous prime (1301331209) and next prime (1301331233).

It can be written as a sum of positive squares in only one way, i.e., 1217242321 + 84088900 = 34889^2 + 9170^2 .

It is an emirp because it is prime and its reverse (1221331031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1301331221 - 2¹⁴ = 1301314837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1301331221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301337221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650665610 + 650665611.

It is an arithmetic number, because the mean of its divisors is an integer number (650665611).

Almost surely, 2^1301331221 is an apocalyptic number.

It is an amenable number.

1301331221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301331221 is an equidigital number, since it uses as much as digits as its factorization.

1301331221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1301331221 is about 36073.9687447888. The cubic root of 1301331221 is about 1091.7652906204.

Adding to 1301331221 its reverse (1221331031), we get a palindrome (2522662252).

The spelling of 1301331221 in words is "one billion, three hundred one million, three hundred thirty-one thousand, two hundred twenty-one".