22031231201173 has 2 divisors, whose sum is σ = 22031231201174. Its totient is φ = 22031231201172.

The previous prime is 22031231201159. The next prime is 22031231201249. The reversal of 22031231201173 is 37110213213022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11835203094289 + 10196028106884 = 3440233^2 + 3193122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22031231201173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22031231201123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11015615600586 + 11015615600587.

It is an arithmetic number, because the mean of its divisors is an integer number (11015615600587).

Almost surely, 2^{22031231201173} is an apocalyptic number.

It is an amenable number.

22031231201173 is a deficient number, since it is larger than the sum of its proper divisors (1).

22031231201173 is an equidigital number, since it uses as much as digits as its factorization.

22031231201173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 22031231201173 its reverse (37110213213022), we get a palindrome (59141444414195).

The spelling of 22031231201173 in words is "twenty-two trillion, thirty-one billion, two hundred thirty-one million, two hundred one thousand, one hundred seventy-three".