10171126421 has 4 divisors (see below), whose sum is σ = 10179390144. Its totient is φ = 10162862700.

The previous prime is 10171126409. The next prime is 10171126439. The reversal of 10171126421 is 12462117101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12462117101 = 7 ⋅1780302443.

It is a cyclic number.

It is not a de Polignac number, because 10171126421 - 2²⁶ = 10104017557 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 (10171128421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4130015 + ... + 4132476.

It is an arithmetic number, because the mean of its divisors is an integer number (2544847536).

Almost surely, 2^10171126421 is an apocalyptic number.

It is an amenable number.

10171126421 is a deficient number, since it is larger than the sum of its proper divisors (8263723).

10171126421 is an equidigital number, since it uses as much as digits as its factorization.

10171126421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8263722.

The product of its (nonzero) digits is 672, while the sum is 26.

The spelling of 10171126421 in words is "ten billion, one hundred seventy-one million, one hundred twenty-six thousand, four hundred twenty-one".