13212171 has 12 divisors (see below), whose sum is σ = 21810672. Its totient is φ = 7549776.

The previous prime is 13212167. The next prime is 13212181. The reversal of 13212171 is 17121231.

It is a happy number.

It is not a de Polignac number, because 13212171 - 2² = 13212167 is a prime.

It is a super-2 number, since 2×13212171² = 349122925066482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13212131) 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 11 ways as a sum of consecutive naturals, for example, 104796 + ... + 104921.

It is an arithmetic number, because the mean of its divisors is an integer number (1817556).

Almost surely, 2^13212171 is an apocalyptic number.

13212171 is a deficient number, since it is larger than the sum of its proper divisors (8598501).

13212171 is a wasteful number, since it uses less digits than its factorization.

13212171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209730 (or 209727 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 13212171 is about 3634.8550177414. The cubic root of 13212171 is about 236.4057644158.

The spelling of 13212171 in words is "thirteen million, two hundred twelve thousand, one hundred seventy-one".