170221012 has 24 divisors (see below), whose sum is σ = 328629672. Its totient is φ = 76646400.

The previous prime is 170220989. The next prime is 170221013. The reversal of 170221012 is 210122071.

170221012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 75076 + 170145936 = 274^2 + 13044^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170221013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37789 + ... + 42052.

It is an arithmetic number, because the mean of its divisors is an integer number (13692903).

Almost surely, 2^170221012 is an apocalyptic number.

It is an amenable number.

170221012 is a deficient number, since it is larger than the sum of its proper divisors (158408660).

170221012 is a wasteful number, since it uses less digits than its factorization.

170221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79899 (or 79897 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 170221012 is about 13046.8774808381. The cubic root of 170221012 is about 554.2057866090.

Adding to 170221012 its reverse (210122071), we get a palindrome (380343083).

The spelling of 170221012 in words is "one hundred seventy million, two hundred twenty-one thousand, twelve".