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BaseRepresentation
bin11000000110110…
…10001001000101
3112002111211211101
430003122021011
5403232020401
632022140101
75003561656
oct1403321105
9462454741
10202220101
11a4169a56
1257881631
1332b83985
141cbdd52d
1512b47101
hexc0da245

202220101 has 4 divisors (see below), whose sum is σ = 202617900. Its totient is φ = 201822304.

The previous prime is 202220089. The next prime is 202220107. The reversal of 202220101 is 101022202.

Adding to 202220101 its reverse (101022202), we get a palindrome (303242303).

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 145202500 + 57017601 = 12050^2 + 7551^2 .

It is a cyclic number.

It is not a de Polignac number, because 202220101 - 27 = 202219973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202220107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198136 + ... + 199153.

It is an arithmetic number, because the mean of its divisors is an integer number (50654475).

Almost surely, 2202220101 is an apocalyptic number.

It is an amenable number.

202220101 is a deficient number, since it is larger than the sum of its proper divisors (397799).

202220101 is an equidigital number, since it uses as much as digits as its factorization.

202220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397798.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 202220101 is about 14220.4114216151. The cubic root of 202220101 is about 586.9594615361.

The spelling of 202220101 in words is "two hundred two million, two hundred twenty thousand, one hundred one".

Divisors: 1 509 397289 202220101