1301021231 has 2 divisors, whose sum is σ = 1301021232. Its totient is φ = 1301021230.

The previous prime is 1301021221. The next prime is 1301021233. The reversal of 1301021231 is 1321201031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1301021231 - 2⁶ = 1301021167 is a prime.

It is a super-2 number, since 2×1301021231² = 3385312487025510722, which contains 22 as substring.

Together with 1301021233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301021233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650510615 + 650510616.

It is an arithmetic number, because the mean of its divisors is an integer number (650510616).

Almost surely, 2^1301021231 is an apocalyptic number.

1301021231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301021231 is an equidigital number, since it uses as much as digits as its factorization.

1301021231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1301021231 is about 36069.6719003653. The cubic root of 1301021231 is about 1091.6785939635.

Adding to 1301021231 its reverse (1321201031), we get a palindrome (2622222262).

The spelling of 1301021231 in words is "one billion, three hundred one million, twenty-one thousand, two hundred thirty-one".