1210130321 has 2 divisors, whose sum is σ = 1210130322. Its totient is φ = 1210130320.

The previous prime is 1210130309. The next prime is 1210130333. The reversal of 1210130321 is 1230310121.

It is a balanced prime because it is at equal distance from previous prime (1210130309) and next prime (1210130333).

It can be written as a sum of positive squares in only one way, i.e., 954130321 + 256000000 = 30889^2 + 16000^2 .

It is an emirp because it is prime and its reverse (1230310121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210130321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1210130296 and 1210130305.

It is not a weakly prime, because it can be changed into another prime (1210130021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605065160 + 605065161.

It is an arithmetic number, because the mean of its divisors is an integer number (605065161).

Almost surely, 2^1210130321 is an apocalyptic number.

It is an amenable number.

1210130321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210130321 is an equidigital number, since it uses as much as digits as its factorization.

1210130321 is an evil number, because the sum of its binary digits is even.

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

The square root of 1210130321 is about 34786.9274440845. The cubic root of 1210130321 is about 1065.6404916878.

Adding to 1210130321 its reverse (1230310121), we get a palindrome (2440440442).

The spelling of 1210130321 in words is "one billion, two hundred ten million, one hundred thirty thousand, three hundred twenty-one".