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2100111001 = 14543144407
BaseRepresentation
bin111110100101101…
…0010011010011001
312102100201200200221
41331023102122121
513300112023001
6544220400041
7103020435412
oct17513223231
95370650627
102100111001
1198850452a
124a73a6021
13276129541
1415ccb8809
15c458a1a1
hex7d2d2699

2100111001 has 4 divisors (see below), whose sum is σ = 2100269952. Its totient is φ = 2099952052.

The previous prime is 2100110993. The next prime is 2100111007. The reversal of 2100111001 is 1001110012.

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 2100111001 - 23 = 2100110993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100111007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57661 + ... + 86746.

It is an arithmetic number, because the mean of its divisors is an integer number (525067488).

Almost surely, 22100111001 is an apocalyptic number.

It is an amenable number.

2100111001 is a deficient number, since it is larger than the sum of its proper divisors (158951).

2100111001 is a wasteful number, since it uses less digits than its factorization.

2100111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158950.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 2100111001 is about 45826.9680537563. The cubic root of 2100111001 is about 1280.6017273785.

Adding to 2100111001 its reverse (1001110012), we get a palindrome (3101221013).

It can be divided in two parts, 2 and 100111001, that multiplied together give a palindrome (200222002).

The spelling of 2100111001 in words is "two billion, one hundred million, one hundred eleven thousand, one".

Divisors: 1 14543 144407 2100111001