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102101210 = 2510210121
BaseRepresentation
bin1100001010111…
…11000011011010
321010010021112022
412011133003122
5202114214320
614044214442
72346563111
oct605370332
9233107468
10102101210
11526a7172
122a23a422
13181cb023
14d7bac78
158e6c325
hex615f0da

102101210 has 8 divisors (see below), whose sum is σ = 183782196. Its totient is φ = 40840480.

The previous prime is 102101191. The next prime is 102101213. The reversal of 102101210 is 12101201.

Adding to 102101210 its reverse (12101201), we get a palindrome (114202411).

Subtracting from 102101210 its reverse (12101201), we obtain a palindrome (90000009).

It can be written as a sum of positive squares in 2 ways, for example, as 91336249 + 10764961 = 9557^2 + 3281^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102101213) 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, 5105051 + ... + 5105070.

Almost surely, 2102101210 is an apocalyptic number.

102101210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102101210 is a deficient number, since it is larger than the sum of its proper divisors (81680986).

102101210 is a wasteful number, since it uses less digits than its factorization.

102101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10210128.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 102101210 is about 10104.5143376612. The cubic root of 102101210 is about 467.3873597861.

The spelling of 102101210 in words is "one hundred two million, one hundred one thousand, two hundred ten".

Divisors: 1 2 5 10 10210121 20420242 51050605 102101210