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12100200031 = 79153167089
BaseRepresentation
bin10110100010011101…
…00110011001011111
31011020021122211221201
423101032212121133
5144240122400111
65320405140331
7605566001053
oct132116463137
934207584851
1012100200031
11514a27a417
1224183ba6a7
1311aab4839a
1482b061c63
154ac4646c1
hex2d13a665f

12100200031 has 4 divisors (see below), whose sum is σ = 12253367200. Its totient is φ = 11947032864.

The previous prime is 12100200029. The next prime is 12100200193. The reversal of 12100200031 is 13000200121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13000200121 = 19684221059.

It is a cyclic number.

It is not a de Polignac number, because 12100200031 - 21 = 12100200029 is a prime.

It is a super-2 number, since 2×121002000312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100199990 and 12100200017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100200001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76583466 + ... + 76583623.

It is an arithmetic number, because the mean of its divisors is an integer number (3063341800).

Almost surely, 212100200031 is an apocalyptic number.

12100200031 is a deficient number, since it is larger than the sum of its proper divisors (153167169).

12100200031 is an equidigital number, since it uses as much as digits as its factorization.

12100200031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153167168.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 12100200031 its reverse (13000200121), we get a palindrome (25100400152).

The spelling of 12100200031 in words is "twelve billion, one hundred million, two hundred thousand, thirty-one".

Divisors: 1 79 153167089 12100200031