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13261026121 = 76728275109
BaseRepresentation
bin11000101100110101…
…10011001101001001
31021020011221220222121
430112122303031021
5204124310313441
610031513451241
7646422601510
oct142632631511
937204856877
1013261026121
11569555a222
1226a1110b21
1313344a5025
148db2b5677
15529312dd1
hex3166b3349

13261026121 has 8 divisors (see below), whose sum is σ = 15381659840. Its totient is φ = 11196942768.

The previous prime is 13261026109. The next prime is 13261026139. The reversal of 13261026121 is 12162016231.

It is a happy number.

13261026121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13261026121 - 25 = 13261026089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13261026221) 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, 14137086 + ... + 14138023.

It is an arithmetic number, because the mean of its divisors is an integer number (1922707480).

Almost surely, 213261026121 is an apocalyptic number.

It is an amenable number.

13261026121 is a deficient number, since it is larger than the sum of its proper divisors (2120633719).

13261026121 is an equidigital number, since it uses as much as digits as its factorization.

13261026121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28275183.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 13261026121 in words is "thirteen billion, two hundred sixty-one million, twenty-six thousand, one hundred twenty-one".

Divisors: 1 7 67 469 28275109 197925763 1894432303 13261026121