1210424321 has 2 divisors, whose sum is σ = 1210424322. Its totient is φ = 1210424320.

The previous prime is 1210424311. The next prime is 1210424363. The reversal of 1210424321 is 1234240121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109622721 + 100801600 = 33311^2 + 10040^2 .

It is an emirp because it is prime and its reverse (1234240121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210424321 is a prime.

It is a super-2 number, since 2×1210424321² = 2930254073736622082, which contains 22 as substring.

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 = 1210424293 and 1210424302.

It is not a weakly prime, because it can be changed into another prime (1210424311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605212160 + 605212161.

It is an arithmetic number, because the mean of its divisors is an integer number (605212161).

Almost surely, 2^1210424321 is an apocalyptic number.

It is an amenable number.

1210424321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210424321 is an equidigital number, since it uses as much as digits as its factorization.

1210424321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1210424321 is about 34791.1529127737. The cubic root of 1210424321 is about 1065.7267834782.

Adding to 1210424321 its reverse (1234240121), we get a palindrome (2444664442).

The spelling of 1210424321 in words is "one billion, two hundred ten million, four hundred twenty-four thousand, three hundred twenty-one".