102011172 has 12 divisors (see below), whose sum is σ = 238026096. Its totient is φ = 34003720.

The previous prime is 102011113. The next prime is 102011191. The reversal of 102011172 is 271110201.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4250454 + ... + 4250477.

It is an arithmetic number, because the mean of its divisors is an integer number (19835508).

Almost surely, 2^102011172 is an apocalyptic number.

102011172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102011172 is an abundant number, since it is smaller than the sum of its proper divisors (136014924).

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

102011172 is a wasteful number, since it uses less digits than its factorization.

102011172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8500938 (or 8500936 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 102011172 is about 10100.0580196353. The cubic root of 102011172 is about 467.2499307933.

Adding to 102011172 its reverse (271110201), we get a palindrome (373121373).

The spelling of 102011172 in words is "one hundred two million, eleven thousand, one hundred seventy-two".