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221122001 = 743297607
BaseRepresentation
bin11010010111000…
…00110111010001
3120102002011100202
431023200313101
5423101401001
633535224545
75323335362
oct1513406721
9512064322
10221122001
111038aa261
1262078155
1336a71329
142151db69
151462c96b
hexd2e0dd1

221122001 has 4 divisors (see below), whose sum is σ = 221420352. Its totient is φ = 220823652.

The previous prime is 221121997. The next prime is 221122003. The reversal of 221122001 is 100221122.

It is a happy number.

221122001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221122001 - 22 = 221121997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221122003) 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, 148061 + ... + 149546.

It is an arithmetic number, because the mean of its divisors is an integer number (55355088).

Almost surely, 2221122001 is an apocalyptic number.

It is an amenable number.

221122001 is a deficient number, since it is larger than the sum of its proper divisors (298351).

221122001 is an equidigital number, since it uses as much as digits as its factorization.

221122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298350.

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

The square root of 221122001 is about 14870.1715188494. The cubic root of 221122001 is about 604.7055927047.

Adding to 221122001 its reverse (100221122), we get a palindrome (321343123).

The spelling of 221122001 in words is "two hundred twenty-one million, one hundred twenty-two thousand, one".

Divisors: 1 743 297607 221122001