2171134021 has 24 divisors (see below), whose sum is σ = 2550170112. Its totient is φ = 1810188000.

The previous prime is 2171134019. The next prime is 2171134057. The reversal of 2171134021 is 1204311712.

It is a happy number.

It is not a de Polignac number, because 2171134021 - 2¹ = 2171134019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2171133983 and 2171134001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171134421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9735916 + ... + 9736138.

It is an arithmetic number, because the mean of its divisors is an integer number (106257088).

Almost surely, 2^2171134021 is an apocalyptic number.

It is an amenable number.

2171134021 is a deficient number, since it is larger than the sum of its proper divisors (379036091).

2171134021 is an equidigital number, since it uses as much as digits as its factorization.

2171134021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 2171134021 is about 46595.4291857045. The cubic root of 2171134021 is about 1294.8780754111.

Adding to 2171134021 its reverse (1204311712), we get a palindrome (3375445733).

The spelling of 2171134021 in words is "two billion, one hundred seventy-one million, one hundred thirty-four thousand, twenty-one".