6105100721 has 2 divisors, whose sum is σ = 6105100722. Its totient is φ = 6105100720.

The previous prime is 6105100699. The next prime is 6105100753. The reversal of 6105100721 is 1270015016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6074020096 + 31080625 = 77936^2 + 5575^2 .

It is a cyclic number.

It is not a de Polignac number, because 6105100721 - 2¹⁸ = 6104838577 is a prime.

It is not a weakly prime, because it can be changed into another prime (6105103721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3052550360 + 3052550361.

It is an arithmetic number, because the mean of its divisors is an integer number (3052550361).

Almost surely, 2^6105100721 is an apocalyptic number.

It is an amenable number.

6105100721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6105100721 is an equidigital number, since it uses as much as digits as its factorization.

6105100721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 6105100721 is about 78135.1439558410. The cubic root of 6105100721 is about 1827.6692755296.

Adding to 6105100721 its reverse (1270015016), we get a palindrome (7375115737).

The spelling of 6105100721 in words is "six billion, one hundred five million, one hundred thousand, seven hundred twenty-one".