6750101221 has 2 divisors, whose sum is σ = 6750101222. Its totient is φ = 6750101220.

The previous prime is 6750101191. The next prime is 6750101233. The reversal of 6750101221 is 1221010576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6163977121 + 586124100 = 78511^2 + 24210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6750101221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6750101021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3375050610 + 3375050611.

It is an arithmetic number, because the mean of its divisors is an integer number (3375050611).

Almost surely, 2^6750101221 is an apocalyptic number.

It is an amenable number.

6750101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6750101221 is an equidigital number, since it uses as much as digits as its factorization.

6750101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 6750101221 is about 82158.9996348544. Note that the first 3 decimals coincide. The cubic root of 6750101221 is about 1889.8910214965.

Adding to 6750101221 its reverse (1221010576), we get a palindrome (7971111797).

The spelling of 6750101221 in words is "six billion, seven hundred fifty million, one hundred one thousand, two hundred twenty-one".