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12030445621 = 31388078891
BaseRepresentation
bin10110011010001001…
…00000100000110101
31011001102101221220001
423031010200200311
5144114243224441
65305434111301
7604061046325
oct131504404065
934042357801
1012030445621
115113966947
1223b8b7b531
13119956459c
14821aa5285
154a6286731
hex2cd120835

12030445621 has 4 divisors (see below), whose sum is σ = 12418524544. Its totient is φ = 11642366700.

The previous prime is 12030445601. The next prime is 12030445627. The reversal of 12030445621 is 12654403021.

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 12030445621 - 225 = 11996891189 is a prime.

It is a super-3 number, since 3×120304456213 (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12030445621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12030445627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194039415 + ... + 194039476.

It is an arithmetic number, because the mean of its divisors is an integer number (3104631136).

Almost surely, 212030445621 is an apocalyptic number.

It is an amenable number.

12030445621 is a deficient number, since it is larger than the sum of its proper divisors (388078923).

12030445621 is an equidigital number, since it uses as much as digits as its factorization.

12030445621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388078922.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 12030445621 its reverse (12654403021), we get a palindrome (24684848642).

The spelling of 12030445621 in words is "twelve billion, thirty million, four hundred forty-five thousand, six hundred twenty-one".

Divisors: 1 31 388078891 12030445621