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BaseRepresentation
bin1011101110000100001101…
…0100000110100011110100
31200121220002200011012122010
42323201003110012203310
53142111042443344340
643223432214204220
72466661603141440
oct273410324064364
950556080135563
1012886031231220
114118a31767994
121541495953670
137261bc183324
151752dde37b80
hexbb8435068f4

12886031231220 has 768 divisors, whose sum is σ = 43570905219072. Its totient is φ = 2784967710720.

The previous prime is 12886031231207. The next prime is 12886031231237. The reversal of 12886031231220 is 2213213068821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 22888154659 + ... + 22888155221.

It is an arithmetic number, because the mean of its divisors is an integer number (56732949504).

Almost surely, 212886031231220 is an apocalyptic number.

12886031231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12886031231220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21785452609536).

12886031231220 is an abundant number, since it is smaller than the sum of its proper divisors (30684873987852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12886031231220 is a wasteful number, since it uses less digits than its factorization.

12886031231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 12886031231220 in words is "twelve trillion, eight hundred eighty-six billion, thirty-one million, two hundred thirty-one thousand, two hundred twenty".