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121117 = 313907
BaseRepresentation
bin11101100100011101
320011010211
4131210131
512333432
62332421
71013053
oct354435
9204124
10121117
1182aa7
125a111
1343189
14321d3
1525d47
hex1d91d

121117 has 4 divisors (see below), whose sum is σ = 125056. Its totient is φ = 117180.

The previous prime is 121081. The next prime is 121123. The reversal of 121117 is 711121.

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 not a de Polignac number, because 121117 - 211 = 119069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121097 and 121106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121157) 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, 1923 + ... + 1984.

It is an arithmetic number, because the mean of its divisors is an integer number (31264).

2121117 is an apocalyptic number.

It is an amenable number.

121117 is a deficient number, since it is larger than the sum of its proper divisors (3939).

121117 is an equidigital number, since it uses as much as digits as its factorization.

121117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938.

The product of its digits is 14, while the sum is 13.

The square root of 121117 is about 348.0186776597. The cubic root of 121117 is about 49.4768112317.

Subtracting from 121117 its sum of digits (13), we obtain a square (121104 = 3482).

Adding to 121117 its reverse (711121), we get a palindrome (832238).

The spelling of 121117 in words is "one hundred twenty-one thousand, one hundred seventeen", and thus it is an iban number.

Divisors: 1 31 3907 121117