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120101 = 831447
BaseRepresentation
bin11101010100100101
320002202012
4131110211
512320401
62324005
71010102
oct352445
9202665
10120101
1182263
1259605
1342887
1431aa9
15258bb
hex1d525

120101 has 4 divisors (see below), whose sum is σ = 121632. Its totient is φ = 118572.

The previous prime is 120097. The next prime is 120103. The reversal of 120101 is 101021.

Adding to 120101 its reverse (101021), we get a palindrome (221122).

Multipling 120101 by its reverse (101021), we get a palindrome (12132723121).

It can be divided in two parts, 1 and 20101, that added together give a palindrome (20102).

It is a happy number.

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 120101 - 22 = 120097 is a prime.

It is an Ulam number.

It is a Duffinian number.

120101 is a modest number, since divided by 101 gives 12 as remainder.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120103) 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, 641 + ... + 806.

It is an arithmetic number, because the mean of its divisors is an integer number (30408).

2120101 is an apocalyptic number.

It is an amenable number.

120101 is a deficient number, since it is larger than the sum of its proper divisors (1531).

120101 is an equidigital number, since it uses as much as digits as its factorization.

120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 120101 is about 346.5559117949. Note that the first 3 decimals coincide. The cubic root of 120101 is about 49.3380757960.

The spelling of 120101 in words is "one hundred twenty thousand, one hundred one", and thus it is an iban number.

Divisors: 1 83 1447 120101