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101230121 = 178217253
BaseRepresentation
bin1100000100010…
…10011000101001
321001111000121202
412002022120221
5201403330441
614013413545
72336304356
oct602123051
9231430552
10101230121
1152161763
1229a9a2b5
1317c846a5
14d63162d
158d4919b
hex608a629

101230121 has 8 divisors (see below), whose sum is σ = 107330184. Its totient is φ = 95146240.

The previous prime is 101230117. The next prime is 101230133. The reversal of 101230121 is 121032101.

It can be written as a sum of positive squares in 4 ways, for example, as 26925721 + 74304400 = 5189^2 + 8620^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101230121 - 22 = 101230117 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101230111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10331 + ... + 17583.

It is an arithmetic number, because the mean of its divisors is an integer number (13416273).

Almost surely, 2101230121 is an apocalyptic number.

It is an amenable number.

101230121 is a deficient number, since it is larger than the sum of its proper divisors (6100063).

101230121 is an equidigital number, since it uses as much as digits as its factorization.

101230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8091.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 101230121 is about 10061.3180548077. The cubic root of 101230121 is about 466.0543708472.

Adding to 101230121 its reverse (121032101), we get a palindrome (222262222).

The spelling of 101230121 in words is "one hundred one million, two hundred thirty thousand, one hundred twenty-one".