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111102121 = 13223101283
BaseRepresentation
bin1101001111101…
…00100010101001
321202001120110101
412213310202221
5211420231441
615005145401
72516231614
oct647644251
9252046411
10111102121
1157794739
123125b261
131a02cc00
1410a8117b
159b49231
hex69f48a9

111102121 has 24 divisors (see below), whose sum is σ = 127227456. Its totient is φ = 96782400.

The previous prime is 111102119. The next prime is 111102127. The reversal of 111102121 is 121201111.

It is not a de Polignac number, because 111102121 - 21 = 111102119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111102098 and 111102107.

It is not an unprimeable number, because it can be changed into a prime (111102127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 392446 + ... + 392728.

It is an arithmetic number, because the mean of its divisors is an integer number (5301144).

Almost surely, 2111102121 is an apocalyptic number.

It is an amenable number.

111102121 is a deficient number, since it is larger than the sum of its proper divisors (16125335).

111102121 is a wasteful number, since it uses less digits than its factorization.

111102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 420 counting only the distinct ones).

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

The square root of 111102121 is about 10540.4990868554. The cubic root of 111102121 is about 480.7368904355.

Adding to 111102121 its reverse (121201111), we get a palindrome (232303232).

It can be divided in two parts, 11110 and 2121, that added together give a palindrome (13231).

The spelling of 111102121 in words is "one hundred eleven million, one hundred two thousand, one hundred twenty-one".

Divisors: 1 13 23 101 169 283 299 1313 2323 3679 3887 6509 17069 28583 30199 47827 84617 371579 392587 657409 1100021 4830527 8546317 111102121