6102420721 has 2 divisors, whose sum is σ = 6102420722. Its totient is φ = 6102420720.

The previous prime is 6102420719. The next prime is 6102420761. The reversal of 6102420721 is 1270242016.

6102420721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5720804496 + 381616225 = 75636^2 + 19535^2 .

It is a cyclic number.

It is not a de Polignac number, because 6102420721 - 2¹ = 6102420719 is a prime.

Together with 6102420719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6102420761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3051210360 + 3051210361.

It is an arithmetic number, because the mean of its divisors is an integer number (3051210361).

Almost surely, 2^6102420721 is an apocalyptic number.

It is an amenable number.

6102420721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6102420721 is an equidigital number, since it uses as much as digits as its factorization.

6102420721 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 25.

The square root of 6102420721 is about 78117.9923001097. The cubic root of 6102420721 is about 1827.4018013424.

Adding to 6102420721 its reverse (1270242016), we get a palindrome (7372662737).

The spelling of 6102420721 in words is "six billion, one hundred two million, four hundred twenty thousand, seven hundred twenty-one".