101220170 has 16 divisors (see below), whose sum is σ = 183421800. Its totient is φ = 40215744.

The previous prime is 101220169. The next prime is 101220233. The reversal of 101220170 is 71022101.

It can be written as a sum of positive squares in 4 ways, for example, as 83521321 + 17698849 = 9139^2 + 4207^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32477 + ... + 35456.

Almost surely, 2^101220170 is an apocalyptic number.

101220170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101220170 is a deficient number, since it is larger than the sum of its proper divisors (82201630).

101220170 is a wasteful number, since it uses less digits than its factorization.

101220170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68089.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 101220170 is about 10060.8235249407. The cubic root of 101220170 is about 466.0390991772.

Adding to 101220170 its reverse (71022101), we get a palindrome (172242271).

The spelling of 101220170 in words is "one hundred one million, two hundred twenty thousand, one hundred seventy".