21141650171 has 2 divisors, whose sum is σ = 21141650172. Its totient is φ = 21141650170.

The previous prime is 21141650119. The next prime is 21141650203. The reversal of 21141650171 is 17105614112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21141650171 - 2²⁶ = 21074541307 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21141650471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570825085 + 10570825086.

It is an arithmetic number, because the mean of its divisors is an integer number (10570825086).

Almost surely, 2^21141650171 is an apocalyptic number.

21141650171 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141650171 is an equidigital number, since it uses as much as digits as its factorization.

21141650171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 29.

The spelling of 21141650171 in words is "twenty-one billion, one hundred forty-one million, six hundred fifty thousand, one hundred seventy-one".