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BaseRepresentation
bin11011010111111001
312200210122
4123113321
512041441
62223025
7644612
oct332771
9180718
10112121
1177269
1254a75
133c059
142cc09
152334b
hex1b5f9

112121 has 2 divisors, whose sum is σ = 112122. Its totient is φ = 112120.

The previous prime is 112111. The next prime is 112129. The reversal of 112121 is 121211.

Adding to 112121 its reverse (121211), we get a palindrome (233332).

It is an a-pointer prime, because the next prime (112129) can be obtained adding 112121 to its sum of digits (8).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67600 + 44521 = 260^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 112121 - 214 = 95737 is a prime.

It is a super-2 number, since 2×1121212 = 25142237282, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 112099 and 112108.

It is not a weakly prime, because it can be changed into another prime (112129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56060 + 56061.

It is an arithmetic number, because the mean of its divisors is an integer number (56061).

2112121 is an apocalyptic number.

It is an amenable number.

112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

112121 is an equidigital number, since it uses as much as digits as its factorization.

112121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4, while the sum is 8.

The square root of 112121 is about 334.8447401409. The cubic root of 112121 is about 48.2201977988.

The spelling of 112121 in words is "one hundred twelve thousand, one hundred twenty-one", and thus it is an iban number.