202121171 has 16 divisors (see below), whose sum is σ = 245597184. Its totient is φ = 162580704.

The previous prime is 202121137. The next prime is 202121189. The reversal of 202121171 is 171121202.

202121171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 202121171 - 2¹⁴ = 202104787 is a prime.

It is a super-2 number, since 2×202121171² = 81705935532822482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202121191) 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, 3311 + ... + 20376.

It is an arithmetic number, because the mean of its divisors is an integer number (15349824).

Almost surely, 2^202121171 is an apocalyptic number.

202121171 is a deficient number, since it is larger than the sum of its proper divisors (43476013).

202121171 is a wasteful number, since it uses less digits than its factorization.

202121171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23770.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 202121171 is about 14216.9325453840. The cubic root of 202121171 is about 586.8637286010.

Adding to 202121171 its reverse (171121202), we get a palindrome (373242373).

The spelling of 202121171 in words is "two hundred two million, one hundred twenty-one thousand, one hundred seventy-one".