10172126221 has 16 divisors (see below), whose sum is σ = 10549019520. Its totient is φ = 9803995200.

The previous prime is 10172126207. The next prime is 10172126227. The reversal of 10172126221 is 12262127101.

It is a cyclic number.

It is not a de Polignac number, because 10172126221 - 2¹⁵ = 10172093453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10172126227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 605491 + ... + 622063.

It is an arithmetic number, because the mean of its divisors is an integer number (659313720).

Almost surely, 2^10172126221 is an apocalyptic number.

It is an amenable number.

10172126221 is a deficient number, since it is larger than the sum of its proper divisors (376893299).

10172126221 is a wasteful number, since it uses less digits than its factorization.

10172126221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16836.

The product of its (nonzero) digits is 672, while the sum is 25.

The spelling of 10172126221 in words is "ten billion, one hundred seventy-two million, one hundred twenty-six thousand, two hundred twenty-one".