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21123341 = 162712983
BaseRepresentation
bin101000010010…
…1000100001101
31110202011202222
41100211010031
520401421331
62032425125
7344355041
oct120450415
943664688
1021123341
1110a18308
1270a81a5
1344b7825
142b3c021
151cc3b7b
hex142510d

21123341 has 4 divisors (see below), whose sum is σ = 21137952. Its totient is φ = 21108732.

The previous prime is 21123331. The next prime is 21123359. The reversal of 21123341 is 14332112.

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 21123341 - 214 = 21106957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123301) 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, 4865 + ... + 8118.

It is an arithmetic number, because the mean of its divisors is an integer number (5284488).

Almost surely, 221123341 is an apocalyptic number.

It is an amenable number.

21123341 is a deficient number, since it is larger than the sum of its proper divisors (14611).

21123341 is a wasteful number, since it uses less digits than its factorization.

21123341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14610.

The product of its digits is 144, while the sum is 17.

The square root of 21123341 is about 4596.0135987614. The cubic root of 21123341 is about 276.4315040153.

Adding to 21123341 its reverse (14332112), we get a palindrome (35455453).

The spelling of 21123341 in words is "twenty-one million, one hundred twenty-three thousand, three hundred forty-one".

Divisors: 1 1627 12983 21123341