8195127021 has 16 divisors (see below), whose sum is σ = 12155713920. Its totient is φ = 5456764800.

The previous prime is 8195127019. The next prime is 8195127029. The reversal of 8195127021 is 1207215918.

It is a happy number.

It is not a de Polignac number, because 8195127021 - 2¹ = 8195127019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8195127029) 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, 162180 + ... + 206621.

It is an arithmetic number, because the mean of its divisors is an integer number (759732120).

Almost surely, 2^8195127021 is an apocalyptic number.

It is an amenable number.

8195127021 is a deficient number, since it is larger than the sum of its proper divisors (3960586899).

8195127021 is a wasteful number, since it uses less digits than its factorization.

8195127021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369633 (or 369627 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 8195127021 is about 90526.9408574044. The cubic root of 8195127021 is about 2016.1301445709.

The spelling of 8195127021 in words is "eight billion, one hundred ninety-five million, one hundred twenty-seven thousand, twenty-one".