1307082221 has 2 divisors, whose sum is σ = 1307082222. Its totient is φ = 1307082220.

The previous prime is 1307082199. The next prime is 1307082241. The reversal of 1307082221 is 1222807031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1081752100 + 225330121 = 32890^2 + 15011^2 .

It is an emirp because it is prime and its reverse (1222807031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1307082221 - 2¹⁸ = 1306820077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1307082241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653541110 + 653541111.

It is an arithmetic number, because the mean of its divisors is an integer number (653541111).

Almost surely, 2^1307082221 is an apocalyptic number.

It is an amenable number.

1307082221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1307082221 is an equidigital number, since it uses as much as digits as its factorization.

1307082221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1307082221 is about 36153.5920898602. The cubic root of 1307082221 is about 1093.3712142235.

Adding to 1307082221 its reverse (1222807031), we get a palindrome (2529889252).

The spelling of 1307082221 in words is "one billion, three hundred seven million, eighty-two thousand, two hundred twenty-one".