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10123122101 = 67714952913
BaseRepresentation
bin10010110110110001…
…01001010110110101
3222010111102212220012
421123120221112311
5131213004401401
64352301350005
7505601055341
oct113330512665
928114385805
1010123122101
114325269514
121b66268305
13c543684a1
146c0652621
153e3acd8bb
hex25b6295b5

10123122101 has 4 divisors (see below), whose sum is σ = 10138075692. Its totient is φ = 10108168512.

The previous prime is 10123122091. The next prime is 10123122103. The reversal of 10123122101 is 10122132101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10122132101 = 50092020789.

It can be written as a sum of positive squares in 2 ways, for example, as 5040858001 + 5082264100 = 70999^2 + 71290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-10123122101 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 (10123122103) 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, 7475780 + ... + 7477133.

It is an arithmetic number, because the mean of its divisors is an integer number (2534518923).

Almost surely, 210123122101 is an apocalyptic number.

It is an amenable number.

10123122101 is a deficient number, since it is larger than the sum of its proper divisors (14953591).

10123122101 is an equidigital number, since it uses as much as digits as its factorization.

10123122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14953590.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 10123122101 its reverse (10122132101), we get a palindrome (20245254202).

The spelling of 10123122101 in words is "ten billion, one hundred twenty-three million, one hundred twenty-two thousand, one hundred one".

Divisors: 1 677 14952913 10123122101