190173126221 has 8 divisors (see below), whose sum is σ = 206913188664. Its totient is φ = 173734686720.

The previous prime is 190173126197. The next prime is 190173126289. The reversal of 190173126221 is 122621371091.

It can be written as a sum of positive squares in 4 ways, for example, as 50965321 + 190122160900 = 7139^2 + 436030^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 190173126221 - 2¹⁴ = 190173109837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190173126821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75404420 + ... + 75406941.

It is an arithmetic number, because the mean of its divisors is an integer number (25864148583).

Almost surely, 2^190173126221 is an apocalyptic number.

It is an amenable number.

190173126221 is a deficient number, since it is larger than the sum of its proper divisors (16740062443).

190173126221 is a wasteful number, since it uses less digits than its factorization.

190173126221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150811471.

The product of its (nonzero) digits is 9072, while the sum is 35.

The spelling of 190173126221 in words is "one hundred ninety billion, one hundred seventy-three million, one hundred twenty-six thousand, two hundred twenty-one".