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21030330123311 = 79252126535991
BaseRepresentation
bin1001100100000100000010…
…10110110100010000101111
32202110110221212100211120012
410302002001112310100233
510224030104002421221
6112421111132243435
74300251120410255
oct462020126642057
982413855324505
1021030330123311
116778a05105543
12243799b01057b
13b971c815b5b2
14529c328c45d5
152670a91d565b
hex1320815b442f

21030330123311 has 4 divisors (see below), whose sum is σ = 21030357451824. Its totient is φ = 21030302794800.

The previous prime is 21030330123293. The next prime is 21030330123331. The reversal of 21030330123311 is 11332103303012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21030330123311 - 210 = 21030330122287 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 (21030330123331) 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, 12475475 + ... + 14060516.

It is an arithmetic number, because the mean of its divisors is an integer number (5257589362956).

Almost surely, 221030330123311 is an apocalyptic number.

21030330123311 is a deficient number, since it is larger than the sum of its proper divisors (27328513).

21030330123311 is an equidigital number, since it uses as much as digits as its factorization.

21030330123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27328512.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21030330123311 its reverse (11332103303012), we get a palindrome (32362433426323).

The spelling of 21030330123311 in words is "twenty-one trillion, thirty billion, three hundred thirty million, one hundred twenty-three thousand, three hundred eleven".

Divisors: 1 792521 26535991 21030330123311