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BaseRepresentation
bin10110101110010111…
…10001011100001001
31011111020200102021212
423113023301130021
5144441212401441
65334334542505
7611221220105
oct132713613411
934436612255
1012200122121
1151a0718360
122445967a35
1311c5762595
1483a432905
154b6100eeb
hex2d72f1709

12200122121 has 4 divisors (see below), whose sum is σ = 13309224144. Its totient is φ = 11091020100.

The previous prime is 12200122117. The next prime is 12200122127. The reversal of 12200122121 is 12122100221.

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.

It is a cyclic number.

It is not a de Polignac number, because 12200122121 - 22 = 12200122117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12200122096 and 12200122105.

It is not an unprimeable number, because it can be changed into a prime (12200122127) 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, 554550995 + ... + 554551016.

It is an arithmetic number, because the mean of its divisors is an integer number (3327306036).

Almost surely, 212200122121 is an apocalyptic number.

12200122121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12200122121 is a deficient number, since it is larger than the sum of its proper divisors (1109102023).

12200122121 is a wasteful number, since it uses less digits than its factorization.

12200122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109102022.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12200122121 its reverse (12122100221), we get a palindrome (24322222342).

The spelling of 12200122121 in words is "twelve billion, two hundred million, one hundred twenty-two thousand, one hundred twenty-one".

Divisors: 1 11 1109102011 12200122121