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203112200221 = 7231498466889
BaseRepresentation
bin1011110100101001101…
…1100011100000011101
3201102021020102211121021
42331022123203200131
511311433210401341
6233150343204141
720450211134020
oct2751233434035
9642236384537
10203112200221
11791595a62a7
1233445a46651
13161cc029378
149b8b5731b7
15543b7cc9d1
hex2f4a6e381d

203112200221 has 16 divisors (see below), whose sum is σ = 243846432000. Its totient is φ = 165409123968.

The previous prime is 203112200189. The next prime is 203112200237. The reversal of 203112200221 is 122002211302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 203112200221 - 25 = 203112200189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203112200195 and 203112200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203112200821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4209456 + ... + 4257433.

It is an arithmetic number, because the mean of its divisors is an integer number (15240402000).

Almost surely, 2203112200221 is an apocalyptic number.

It is an amenable number.

203112200221 is a deficient number, since it is larger than the sum of its proper divisors (40734231779).

203112200221 is a wasteful number, since it uses less digits than its factorization.

203112200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8467068.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 203112200221 its reverse (122002211302), we get a palindrome (325114411523).

The spelling of 203112200221 in words is "two hundred three billion, one hundred twelve million, two hundred thousand, two hundred twenty-one".

Divisors: 1 7 23 149 161 1043 3427 23989 8466889 59268223 194738447 1261566461 1363169129 8830965227 29016028603 203112200221