102111197 has 16 divisors (see below), whose sum is σ = 113363712. Its totient is φ = 91553280.

The previous prime is 102111193. The next prime is 102111199. The reversal of 102111197 is 791111201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102111197 - 2² = 102111193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28268 + ... + 31674.

It is an arithmetic number, because the mean of its divisors is an integer number (7085232).

Almost surely, 2^102111197 is an apocalyptic number.

102111197 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

102111197 is a deficient number, since it is larger than the sum of its proper divisors (11252515).

102111197 is a wasteful number, since it uses less digits than its factorization.

102111197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3508.

The product of its (nonzero) digits is 126, while the sum is 23.

The square root of 102111197 is about 10105.0085106347. The cubic root of 102111197 is about 467.4025984086.

Adding to 102111197 its reverse (791111201), we get a palindrome (893222398).

The spelling of 102111197 in words is "one hundred two million, one hundred eleven thousand, one hundred ninety-seven".