Search a number
-
+
21120003 = 3223257397
BaseRepresentation
bin101000010010…
…0010000000011
31110202000012100
41100210100003
520401320003
62032401443
7344342232
oct120442003
943660170
1021120003
1110a15853
1270a6283
1344b6158
142b3ab19
151cc2ba3
hex1424403

21120003 has 24 divisors (see below), whose sum is σ = 32037408. Its totient is φ = 13381632.

The previous prime is 21119999. The next prime is 21120017. The reversal of 21120003 is 30002112.

It is a happy number.

It is not a de Polignac number, because 21120003 - 22 = 21119999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (21120403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53001 + ... + 53397.

It is an arithmetic number, because the mean of its divisors is an integer number (1334892).

Almost surely, 221120003 is an apocalyptic number.

21120003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21120003 is a deficient number, since it is larger than the sum of its proper divisors (10917405).

21120003 is a wasteful number, since it uses less digits than its factorization.

21120003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 21120003 is about 4595.6504436260. The cubic root of 21120003 is about 276.4169422884.

Adding to 21120003 its reverse (30002112), we get a palindrome (51122115).

The spelling of 21120003 in words is "twenty-one million, one hundred twenty thousand, three".

Divisors: 1 3 9 23 69 207 257 397 771 1191 2313 3573 5911 9131 17733 27393 53199 82179 102029 306087 918261 2346667 7040001 21120003