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1321231011 = 3538309629
BaseRepresentation
bin100111011000000…
…0110001010100011
310102002010111012220
41032300012022203
510201213343021
6335034322123
744512164312
oct11660061243
93362114186
101321231011
11618889461
1230a589343
1318095c7c9
14c768a279
157aed5cc6
hex4ec062a3

1321231011 has 8 divisors (see below), whose sum is σ = 1794880080. Its totient is φ = 864201312.

The previous prime is 1321231003. The next prime is 1321231031. The reversal of 1321231011 is 1101321231.

It is a happy number.

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

It is not a de Polignac number, because 1321231011 - 23 = 1321231003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321231031) 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 7 ways as a sum of consecutive naturals, for example, 4154656 + ... + 4154973.

It is an arithmetic number, because the mean of its divisors is an integer number (224360010).

Almost surely, 21321231011 is an apocalyptic number.

1321231011 is a deficient number, since it is larger than the sum of its proper divisors (473649069).

1321231011 is an equidigital number, since it uses as much as digits as its factorization.

1321231011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8309685.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1321231011 is about 36348.7415325483. The cubic root of 1321231011 is about 1097.3022074256.

Adding to 1321231011 its reverse (1101321231), we get a palindrome (2422552242).

The spelling of 1321231011 in words is "one billion, three hundred twenty-one million, two hundred thirty-one thousand, eleven".

Divisors: 1 3 53 159 8309629 24928887 440410337 1321231011