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12120013213 = 711157402769
BaseRepresentation
bin10110100100110100…
…01011100110011101
31011021122221110112021
423102122023212131
5144310210410323
65322353540141
7606226261330
oct132232134635
934248843467
1012120013213
11515a482350
122422b74651
1311b1c94769
1482d93c617
154ae07a05d
hex2d268b99d

12120013213 has 8 divisors (see below), whose sum is σ = 15110665920. Its totient is φ = 9444166080.

The previous prime is 12120013163. The next prime is 12120013229. The reversal of 12120013213 is 31231002121.

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 12120013213 - 29 = 12120012701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120013253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78701308 + ... + 78701461.

It is an arithmetic number, because the mean of its divisors is an integer number (1888833240).

Almost surely, 212120013213 is an apocalyptic number.

It is an amenable number.

12120013213 is a deficient number, since it is larger than the sum of its proper divisors (2990652707).

12120013213 is a wasteful number, since it uses less digits than its factorization.

12120013213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157402787.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12120013213 its reverse (31231002121), we get a palindrome (43351015334).

The spelling of 12120013213 in words is "twelve billion, one hundred twenty million, thirteen thousand, two hundred thirteen".

Divisors: 1 7 11 77 157402769 1101819383 1731430459 12120013213