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12530612101 = 71790087443
BaseRepresentation
bin10111010101110000…
…11111011110000101
31012100021120001022111
423222320133132011
5201130314041401
65431222301021
7622343305540
oct135270373605
935307501274
1012530612101
115350227377
122518587771
131249077397
1486c2a1857
154d5133e51
hex2eae1f785

12530612101 has 4 divisors (see below), whose sum is σ = 14320699552. Its totient is φ = 10740524652.

The previous prime is 12530612089. The next prime is 12530612111. The reversal of 12530612101 is 10121603521.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10121603521 = 60911661731.

It is a cyclic number.

It is not a de Polignac number, because 12530612101 - 225 = 12497057669 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 (12530612111) 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, 895043715 + ... + 895043728.

It is an arithmetic number, because the mean of its divisors is an integer number (3580174888).

Almost surely, 212530612101 is an apocalyptic number.

It is an amenable number.

12530612101 is a deficient number, since it is larger than the sum of its proper divisors (1790087451).

12530612101 is an equidigital number, since it uses as much as digits as its factorization.

12530612101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790087450.

The product of its (nonzero) digits is 360, while the sum is 22.

The spelling of 12530612101 in words is "twelve billion, five hundred thirty million, six hundred twelve thousand, one hundred one".

Divisors: 1 7 1790087443 12530612101