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100010101 = 891123709
BaseRepresentation
bin1011111011000…
…00100001110101
320222012001001211
411331200201311
5201100310401
613531321421
72323033432
oct575404165
9228161054
10100010101
11514a9084
12295b0271
1317948299
14d3d4b89
158ba7951
hex5f60875

100010101 has 4 divisors (see below), whose sum is σ = 101133900. Its totient is φ = 98886304.

The previous prime is 100010077. The next prime is 100010107. The reversal of 100010101 is 101010001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101010001 = 311324791.

It can be written as a sum of positive squares in 2 ways, for example, as 55800900 + 44209201 = 7470^2 + 6649^2 .

It is a cyclic number.

It is not a de Polignac number, because 100010101 - 221 = 97912949 is a prime.

It is a Duffinian number.

100010101 is a modest number, since divided by 10101 gives 100 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100010107) 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, 561766 + ... + 561943.

It is an arithmetic number, because the mean of its divisors is an integer number (25283475).

Almost surely, 2100010101 is an apocalyptic number.

It is an amenable number.

100010101 is a deficient number, since it is larger than the sum of its proper divisors (1123799).

100010101 is an equidigital number, since it uses as much as digits as its factorization.

100010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123798.

The product of its (nonzero) digits is 1, while the sum is 4.

The square root of 100010101 is about 10000.5050372469. The cubic root of 100010101 is about 464.1745110647.

Adding to 100010101 its reverse (101010001), we get a palindrome (201020102).

The spelling of 100010101 in words is "one hundred million, ten thousand, one hundred one".

Divisors: 1 89 1123709 100010101