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12991244211 = 341114580521
BaseRepresentation
bin11000001100101011…
…01010011110110011
31020112101022120210000
430012111222132303
5203101224303321
65545035241043
7636635516361
oct140625523663
936471276700
1012991244211
115567245070
1226268a9183
1312c062756a
148b352a631
155107c2826
hex30656a7b3

12991244211 has 20 divisors (see below), whose sum is σ = 21170917944. Its totient is φ = 7873480800.

The previous prime is 12991244209. The next prime is 12991244221. The reversal of 12991244211 is 11244219921.

12991244211 is a `hidden beast` number, since 129 + 91 + 2 + 442 + 1 + 1 = 666.

It is not a de Polignac number, because 12991244211 - 21 = 12991244209 is a prime.

It is a super-2 number, since 2×129912442112 (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12991244221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7289370 + ... + 7291151.

Almost surely, 212991244211 is an apocalyptic number.

12991244211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12991244211 is a deficient number, since it is larger than the sum of its proper divisors (8179673733).

12991244211 is a wasteful number, since it uses less digits than its factorization.

12991244211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14580544 (or 14580535 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The spelling of 12991244211 in words is "twelve billion, nine hundred ninety-one million, two hundred forty-four thousand, two hundred eleven".

Divisors: 1 3 9 11 27 33 81 99 297 891 14580521 43741563 131224689 160385731 393674067 481157193 1181022201 1443471579 4330414737 12991244211