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221201111001 = 31344312803213
BaseRepresentation
bin1100111000000010011…
…1010001011111011001
3210010221212220201021210
43032000213101133121
512111004441023001
6245341323253333
721660366264153
oct3160047213731
9703855821253
10221201111001
11858a1295742
1236a5397a249
1317b227b9b80
14a9c5b05ad3
155b49899dd6
hex33809d17d9

221201111001 has 16 divisors (see below), whose sum is σ = 318339112896. Its totient is φ = 135816472896.

The previous prime is 221201110997. The next prime is 221201111029. The reversal of 221201111001 is 100111102122.

221201111001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221201111001 - 22 = 221201110997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221201111101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6384330 + ... + 6418883.

It is an arithmetic number, because the mean of its divisors is an integer number (19896194556).

Almost surely, 2221201111001 is an apocalyptic number.

It is an amenable number.

221201111001 is a deficient number, since it is larger than the sum of its proper divisors (97138001895).

221201111001 is a wasteful number, since it uses less digits than its factorization.

221201111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12803672.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221201111001 its reverse (100111102122), we get a palindrome (321312213123).

The spelling of 221201111001 in words is "two hundred twenty-one billion, two hundred one million, one hundred eleven thousand, one".

Divisors: 1 3 13 39 443 1329 5759 17277 12803213 38409639 166441769 499325307 5671823359 17015470077 73733703667 221201111001