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12122121986 = 2132320271107
BaseRepresentation
bin10110100101000100…
…01110011100000010
31011021210220121012222
423102202032130002
5144311230400421
65322511051042
7606253223342
oct132242163402
934253817188
1012122121986
115160692737
122423810a82
1311b2552560
1482dd2ad22
154ae344cab
hex2d288e702

12122121986 has 16 divisors (see below), whose sum is σ = 20433276864. Its totient is φ = 5351571984.

The previous prime is 12122121953. The next prime is 12122121989. The reversal of 12122121986 is 68912122121.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12122121989) 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, 10134956 + ... + 10136151.

It is an arithmetic number, because the mean of its divisors is an integer number (1277079804).

Almost surely, 212122121986 is an apocalyptic number.

12122121986 is a deficient number, since it is larger than the sum of its proper divisors (8311154878).

12122121986 is a wasteful number, since it uses less digits than its factorization.

12122121986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20271145.

The product of its digits is 6912, while the sum is 35.

The spelling of 12122121986 in words is "twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, nine hundred eighty-six".

Divisors: 1 2 13 23 26 46 299 598 20271107 40542214 263524391 466235461 527048782 932470922 6061060993 12122121986