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212012021122001 = 276806976592029
BaseRepresentation
bin110000001101001011100101…
…001101010000001111010001
31000210200011002021120102122122
4300031023211031100033101
5210242101104401401001
62030524551121544025
762441235345225122
oct6015134515201721
91023604067512578
10212012021122001
116160a87a866021
121b941424aa5015
13913b8562ca2b9
143a4d617d5c049
151979dbc503b1b
hexc0d2e53503d1

212012021122001 has 4 divisors (see below), whose sum is σ = 212012100482100. Its totient is φ = 212011941761904.

The previous prime is 212012021121959. The next prime is 212012021122007. The reversal of 212012021122001 is 100221120210212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 200327082153025 + 11684938968976 = 14153695^2 + 3418324^2 .

It is a cyclic number.

It is not a de Polignac number, because 212012021122001 - 226 = 212011954013137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212012021122007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35527946 + ... + 41064083.

It is an arithmetic number, because the mean of its divisors is an integer number (53003025120525).

Almost surely, 2212012021122001 is an apocalyptic number.

It is an amenable number.

212012021122001 is a deficient number, since it is larger than the sum of its proper divisors (79360099).

212012021122001 is an equidigital number, since it uses as much as digits as its factorization.

212012021122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79360098.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212012021122001 its reverse (100221120210212), we get a palindrome (312233141332213).

The spelling of 212012021122001 in words is "two hundred twelve trillion, twelve billion, twenty-one million, one hundred twenty-two thousand, one".

Divisors: 1 2768069 76592029 212012021122001