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2100111212 = 222918104407
BaseRepresentation
bin111110100101101…
…0010011101101100
312102100201200222202
41331023102131230
513300112024322
6544220401032
7103020436133
oct17513223554
95370650882
102100111212
11988504701
124a73a6178
13276129674
1415ccb891a
15c458a292
hex7d2d276c

2100111212 has 12 divisors (see below), whose sum is σ = 3801925680. Its totient is φ = 1013846736.

The previous prime is 2100111203. The next prime is 2100111239. The reversal of 2100111212 is 2121110012.

It is a super-4 number, since 4×21001112124 (a number of 38 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2100111193 and 2100111202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9052088 + ... + 9052319.

It is an arithmetic number, because the mean of its divisors is an integer number (316827140).

Almost surely, 22100111212 is an apocalyptic number.

It is an amenable number.

2100111212 is a deficient number, since it is larger than the sum of its proper divisors (1701814468).

2100111212 is a wasteful number, since it uses less digits than its factorization.

2100111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18104440 (or 18104438 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2100111212 is about 45826.9703558941. The cubic root of 2100111212 is about 1280.6017702662.

Adding to 2100111212 its reverse (2121110012), we get a palindrome (4221221224).

The spelling of 2100111212 in words is "two billion, one hundred million, one hundred eleven thousand, two hundred twelve".

Divisors: 1 2 4 29 58 116 18104407 36208814 72417628 525027803 1050055606 2100111212