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123230101 = 517123831
BaseRepresentation
bin1110101100001…
…01011110010101
322120212201220211
413112011132111
5223021330401
620121125421
73024303301
oct726053625
9276781824
10123230101
1163618665
1235329871
131c6b8227
141251ad01
15ac42951
hex7585795

123230101 has 4 divisors (see below), whose sum is σ = 123259104. Its totient is φ = 123201100.

The previous prime is 123230089. The next prime is 123230111. The reversal of 123230101 is 101032321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101032321 = 137771717.

It is a cyclic number.

It is not a de Polignac number, because 123230101 - 25 = 123230069 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123230111) 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, 6745 + ... + 17086.

It is an arithmetic number, because the mean of its divisors is an integer number (30814776).

Almost surely, 2123230101 is an apocalyptic number.

It is an amenable number.

123230101 is a deficient number, since it is larger than the sum of its proper divisors (29003).

123230101 is an equidigital number, since it uses as much as digits as its factorization.

123230101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29002.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 123230101 is about 11100.9054135237. The cubic root of 123230101 is about 497.6289082888.

Adding to 123230101 its reverse (101032321), we get a palindrome (224262422).

The spelling of 123230101 in words is "one hundred twenty-three million, two hundred thirty thousand, one hundred one".

Divisors: 1 5171 23831 123230101