42440011221173 has 2 divisors, whose sum is σ = 42440011221174. Its totient is φ = 42440011221172.

The previous prime is 42440011221169. The next prime is 42440011221227. The reversal of 42440011221173 is 37112211004424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36639269029444 + 5800742191729 = 6053038^2 + 2408473^2 .

It is a cyclic number.

It is not a de Polignac number, because 42440011221173 - 2² = 42440011221169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42440041221173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21220005610586 + 21220005610587.

It is an arithmetic number, because the mean of its divisors is an integer number (21220005610587).

Almost surely, 2^{42440011221173} is an apocalyptic number.

It is an amenable number.

42440011221173 is a deficient number, since it is larger than the sum of its proper divisors (1).

42440011221173 is an equidigital number, since it uses as much as digits as its factorization.

42440011221173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

Adding to 42440011221173 its reverse (37112211004424), we get a palindrome (79552222225597).

The spelling of 42440011221173 in words is "forty-two trillion, four hundred forty billion, eleven million, two hundred twenty-one thousand, one hundred seventy-three".