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21122233 = 111920203
BaseRepresentation
bin101000010010…
…0110010111001
31110202010020221
41100210302321
520401402413
62032420041
7344351566
oct120446271
943663227
1021122233
1110a174a0
1270a7621
1344b7182
142b3b86d
151cc368d
hex1424cb9

21122233 has 4 divisors (see below), whose sum is σ = 23042448. Its totient is φ = 19202020.

The previous prime is 21122221. The next prime is 21122251. The reversal of 21122233 is 33222112.

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 21122233 - 25 = 21122201 is a prime.

It is a super-2 number, since 2×211222332 = 892297453812578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960091 + ... + 960112.

It is an arithmetic number, because the mean of its divisors is an integer number (5760612).

Almost surely, 221122233 is an apocalyptic number.

It is an amenable number.

21122233 is a deficient number, since it is larger than the sum of its proper divisors (1920215).

21122233 is a wasteful number, since it uses less digits than its factorization.

21122233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920214.

The product of its digits is 144, while the sum is 16.

The square root of 21122233 is about 4595.8930579377. The cubic root of 21122233 is about 276.4266706343.

Adding to 21122233 its reverse (33222112), we get a palindrome (54344345).

The spelling of 21122233 in words is "twenty-one million, one hundred twenty-two thousand, two hundred thirty-three".

Divisors: 1 11 1920203 21122233