1301233121 has 2 divisors, whose sum is σ = 1301233122. Its totient is φ = 1301233120.

The previous prime is 1301233097. The next prime is 1301233123. The reversal of 1301233121 is 1213321031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 737882896 + 563350225 = 27164^2 + 23735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1301233121 is a prime.

Together with 1301233123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1301233121.

It is not a weakly prime, because it can be changed into another prime (1301233123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650616560 + 650616561.

It is an arithmetic number, because the mean of its divisors is an integer number (650616561).

Almost surely, 2^1301233121 is an apocalyptic number.

It is an amenable number.

1301233121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301233121 is an equidigital number, since it uses as much as digits as its factorization.

1301233121 is an evil number, because the sum of its binary digits is even.

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

The square root of 1301233121 is about 36072.6090129339. The cubic root of 1301233121 is about 1091.7378559277.

Adding to 1301233121 its reverse (1213321031), we get a palindrome (2514554152).

The spelling of 1301233121 in words is "one billion, three hundred one million, two hundred thirty-three thousand, one hundred twenty-one".