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123121121441 = 144318531711
BaseRepresentation
bin111001010101010010…
…1110011100010100001
3102202210112010000012212
41302222211303202201
54004123001341231
6132321104531505
711616025156553
oct1625245634241
9382715100185
10123121121441
114824073292a
121ba41020b95
13b7c19c90a6
145d5da7b4d3
153308ec242b
hex1caa9738a1

123121121441 has 4 divisors (see below), whose sum is σ = 123129667584. Its totient is φ = 123112575300.

The previous prime is 123121121341. The next prime is 123121121447. The reversal of 123121121441 is 144121121321.

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 123121121441 - 214 = 123121105057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123121121447) 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, 4251425 + ... + 4280286.

It is an arithmetic number, because the mean of its divisors is an integer number (30782416896).

Almost surely, 2123121121441 is an apocalyptic number.

It is an amenable number.

123121121441 is a deficient number, since it is larger than the sum of its proper divisors (8546143).

123121121441 is an equidigital number, since it uses as much as digits as its factorization.

123121121441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8546142.

The product of its digits is 384, while the sum is 23.

Adding to 123121121441 its reverse (144121121321), we get a palindrome (267242242762).

The spelling of 123121121441 in words is "one hundred twenty-three billion, one hundred twenty-one million, one hundred twenty-one thousand, four hundred forty-one".

Divisors: 1 14431 8531711 123121121441