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221020103 = 1911632637
BaseRepresentation
bin11010010110001…
…11111111000111
3120101212222120202
431023013333013
5423040120403
633533121115
75322432323
oct1513077707
9511788522
10221020103
1110383a747
126202919b
1336a36b35
14214d4983
151460c688
hexd2c7fc7

221020103 has 4 divisors (see below), whose sum is σ = 232652760. Its totient is φ = 209387448.

The previous prime is 221020099. The next prime is 221020127. The reversal of 221020103 is 301020122.

It is a happy number.

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

It is not a de Polignac number, because 221020103 - 22 = 221020099 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 (221020003) 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, 5816300 + ... + 5816337.

It is an arithmetic number, because the mean of its divisors is an integer number (58163190).

Almost surely, 2221020103 is an apocalyptic number.

221020103 is a deficient number, since it is larger than the sum of its proper divisors (11632657).

221020103 is a wasteful number, since it uses less digits than its factorization.

221020103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11632656.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 221020103 is about 14866.7448690021. The cubic root of 221020103 is about 604.6126911124.

Adding to 221020103 its reverse (301020122), we get a palindrome (522040225).

The spelling of 221020103 in words is "two hundred twenty-one million, twenty thousand, one hundred three".

Divisors: 1 19 11632637 221020103