22012001208173 has 2 divisors, whose sum is σ = 22012001208174. Its totient is φ = 22012001208172.

The previous prime is 22012001208167. The next prime is 22012001208187. The reversal of 22012001208173 is 37180210021022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20531211575044 + 1480789633129 = 4531138^2 + 1216877^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012001208173 - 2¹⁰ = 22012001207149 is a prime.

It is a super-2 number, since 2×22012001208173² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22012001208133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006000604086 + 11006000604087.

It is an arithmetic number, because the mean of its divisors is an integer number (11006000604087).

Almost surely, 2^{22012001208173} is an apocalyptic number.

It is an amenable number.

22012001208173 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012001208173 is an equidigital number, since it uses as much as digits as its factorization.

22012001208173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

Adding to 22012001208173 its reverse (37180210021022), we get a palindrome (59192211229195).

The spelling of 22012001208173 in words is "twenty-two trillion, twelve billion, one million, two hundred eight thousand, one hundred seventy-three".