7105437552221 has 2 divisors, whose sum is σ = 7105437552222. Its totient is φ = 7105437552220.

The previous prime is 7105437552173. The next prime is 7105437552223. The reversal of 7105437552221 is 1222557345017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6461814840100 + 643622712121 = 2542010^2 + 802261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7105437552221 is a prime.

It is a super-2 number, since 2×7105437552221² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 7105437552223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7105437552223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3552718776110 + 3552718776111.

It is an arithmetic number, because the mean of its divisors is an integer number (3552718776111).

Almost surely, 2^{7105437552221} is an apocalyptic number.

It is an amenable number.

7105437552221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7105437552221 is an equidigital number, since it uses as much as digits as its factorization.

7105437552221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588000, while the sum is 44.

The spelling of 7105437552221 in words is "seven trillion, one hundred five billion, four hundred thirty-seven million, five hundred fifty-two thousand, two hundred twenty-one".