101216172 has 24 divisors (see below), whose sum is σ = 236417776. Its totient is φ = 33703488.

The previous prime is 101216153. The next prime is 101216183. The reversal of 101216172 is 271612101.

It is a happy 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, 9258 + ... + 16974.

Almost surely, 2^101216172 is an apocalyptic number.

101216172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101216172 is an abundant number, since it is smaller than the sum of its proper divisors (135201604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101216172 is a wasteful number, since it uses less digits than its factorization.

101216172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8817 (or 8815 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 101216172 is about 10060.6248314903. The cubic root of 101216172 is about 466.0329632168.

Adding to 101216172 its reverse (271612101), we get a palindrome (372828273).

The spelling of 101216172 in words is "one hundred one million, two hundred sixteen thousand, one hundred seventy-two".