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12112303121 = 95318017057
BaseRepresentation
bin10110100011111001…
…10001010000010001
31011021010102202021022
423101330301100101
5144301222144441
65321520405225
7606103610042
oct132174612021
934233382238
1012112303121
115156096676
122420476815
1311b04c5289
1482c8d28c9
154ad55584b
hex2d1f31411

12112303121 has 8 divisors (see below), whose sum is σ = 12133464264. Its totient is φ = 12091161600.

The previous prime is 12112303031. The next prime is 12112303127. The reversal of 12112303121 is 12130321121.

It can be written as a sum of positive squares in 4 ways, for example, as 3023350225 + 9088952896 = 54985^2 + 95336^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12112303121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12112303121.

It is not an unprimeable number, because it can be changed into a prime (12112303127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1712825 + ... + 1719881.

It is an arithmetic number, because the mean of its divisors is an integer number (1516683033).

Almost surely, 212112303121 is an apocalyptic number.

It is an amenable number.

12112303121 is a deficient number, since it is larger than the sum of its proper divisors (21161143).

12112303121 is an equidigital number, since it uses as much as digits as its factorization.

12112303121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9811.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12112303121 its reverse (12130321121), we get a palindrome (24242624242).

The spelling of 12112303121 in words is "twelve billion, one hundred twelve million, three hundred three thousand, one hundred twenty-one".

Divisors: 1 953 1801 7057 1716353 6725321 12709657 12112303121