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201201221 = 1316079631
BaseRepresentation
bin10111111111000…
…01011001000101
3112000121002012002
423333201121011
5403001414341
631544235045
74662116324
oct1377413105
9460532162
10201201221
11a3633501
125746ba85
13328b7ca0
141ca160bb
15129e529b
hexbfe1645

201201221 has 8 divisors (see below), whose sum is σ = 216835584. Its totient is φ = 185589360.

The previous prime is 201201193. The next prime is 201201251. The reversal of 201201221 is 122102102.

Adding to 201201221 its reverse (122102102), we get a palindrome (323303323).

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201201221 - 218 = 200939077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201251) 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, 16076 + ... + 25706.

It is an arithmetic number, because the mean of its divisors is an integer number (27104448).

Almost surely, 2201201221 is an apocalyptic number.

It is an amenable number.

201201221 is a deficient number, since it is larger than the sum of its proper divisors (15634363).

201201221 is a wasteful number, since it uses less digits than its factorization.

201201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11251.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 201201221 is about 14184.5416210747. The cubic root of 201201221 is about 585.9720086262.

The spelling of 201201221 in words is "two hundred one million, two hundred one thousand, two hundred twenty-one".

Divisors: 1 13 1607 9631 20891 125203 15477017 201201221