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12200111101 = 31393551971
BaseRepresentation
bin10110101110010111…
…01110101111111101
31011111020122212011201
423113023232233331
5144441212023401
65334334415501
7611221143013
oct132713565775
934436585151
1012200111101
1151a0710052
122445961591
1311c575a569
1483a42c8b3
154b60ecb01
hex2d72eebfd

12200111101 has 4 divisors (see below), whose sum is σ = 12593663104. Its totient is φ = 11806559100.

The previous prime is 12200111069. The next prime is 12200111113. The reversal of 12200111101 is 10111100221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10111100221 = 15619647359.

It is a cyclic number.

It is not a de Polignac number, because 12200111101 - 25 = 12200111069 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 (12200111401) 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, 196775955 + ... + 196776016.

It is an arithmetic number, because the mean of its divisors is an integer number (3148415776).

Almost surely, 212200111101 is an apocalyptic number.

It is an amenable number.

12200111101 is a deficient number, since it is larger than the sum of its proper divisors (393552003).

12200111101 is an equidigital number, since it uses as much as digits as its factorization.

12200111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393552002.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12200111101 its reverse (10111100221), we get a palindrome (22311211322).

The spelling of 12200111101 in words is "twelve billion, two hundred million, one hundred eleven thousand, one hundred one".

Divisors: 1 31 393551971 12200111101