102210197 has 4 divisors (see below), whose sum is σ = 103885836. Its totient is φ = 100534560.

The previous prime is 102210191. The next prime is 102210209. The reversal of 102210197 is 791012201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791012201 = 7 ⋅113001743.

It can be written as a sum of positive squares in 2 ways, for example, as 2390116 + 99820081 = 1546^2 + 9991^2 .

It is a cyclic number.

It is not a de Polignac number, because 102210197 - 2⁶ = 102210133 is a prime.

It is a super-3 number, since 3×102210197³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102210191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837728 + ... + 837849.

It is an arithmetic number, because the mean of its divisors is an integer number (25971459).

Almost surely, 2^102210197 is an apocalyptic number.

It is an amenable number.

102210197 is a deficient number, since it is larger than the sum of its proper divisors (1675639).

102210197 is an equidigital number, since it uses as much as digits as its factorization.

102210197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675638.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 102210197 is about 10109.9058848241. The cubic root of 102210197 is about 467.5536034316.

Adding to 102210197 its reverse (791012201), we get a palindrome (893222398).

The spelling of 102210197 in words is "one hundred two million, two hundred ten thousand, one hundred ninety-seven".