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BaseRepresentation
bin10001110001010010011…
…001100101110000000101
311022202000021002120101201
4101301102121211300011
5130001410201331010
62332553502022501
7154140212346103
oct21612231456005
94282007076351
101221153152005
114309851342a6
12178801877a31
138b200b632b7
1443165a26c73
1521b71cdb23a
hex11c52665c05

1221153152005 has 8 divisors (see below), whose sum is σ = 1466299084824. Its totient is φ = 976312320000.

The previous prime is 1221153152003. The next prime is 1221153152047. The reversal of 1221153152005 is 5002513511221.

Adding to 1221153152005 its reverse (5002513511221), we get a palindrome (6223666663226).

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 948771454401 + 272381697604 = 974049^2 + 521902^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1221153152005 - 21 = 1221153152003 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 (1221153152003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76266396 + ... + 76282405.

It is an arithmetic number, because the mean of its divisors is an integer number (183287385603).

Almost surely, 21221153152005 is an apocalyptic number.

It is an amenable number.

1221153152005 is a deficient number, since it is larger than the sum of its proper divisors (245145932819).

1221153152005 is a wasteful number, since it uses less digits than its factorization.

1221153152005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152550407.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 1221153152005 in words is "one trillion, two hundred twenty-one billion, one hundred fifty-three million, one hundred fifty-two thousand, five".