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2112311121 = 31542745641
BaseRepresentation
bin111110111100111…
…0100111101010001
312110012200112010020
41331321310331101
513311222423441
6545334054053
7103226230314
oct17571647521
95405615106
102112311121
11994387678
124ab4aa329
1327880b64b
1416077297b
15c5699e66
hex7de74f51

2112311121 has 8 divisors (see below), whose sum is σ = 2816659104. Its totient is φ = 1408085280.

The previous prime is 2112311041. The next prime is 2112311141. The reversal of 2112311121 is 1211132112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2112311121 - 218 = 2112048977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2112311121.

It is not an unprimeable number, because it can be changed into a prime (2112311141) 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, 23461 + ... + 69101.

It is an arithmetic number, because the mean of its divisors is an integer number (352082388).

Almost surely, 22112311121 is an apocalyptic number.

It is an amenable number.

2112311121 is a deficient number, since it is larger than the sum of its proper divisors (704347983).

2112311121 is a wasteful number, since it uses less digits than its factorization.

2112311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61071.

The product of its digits is 24, while the sum is 15.

The square root of 2112311121 is about 45959.8859985531. The cubic root of 2112311121 is about 1283.0767296177.

Adding to 2112311121 its reverse (1211132112), we get a palindrome (3323443233).

The spelling of 2112311121 in words is "two billion, one hundred twelve million, three hundred eleven thousand, one hundred twenty-one".

Divisors: 1 3 15427 45641 46281 136923 704103707 2112311121