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2123101123 = 111331478931
BaseRepresentation
bin111111010001011…
…1111001111000011
312110221222201012221
41332202333033003
513322003213443
6550401231511
7103420030123
oct17642771703
95427881187
102123101123
1199a487330
124b3032597
1327ab18970
14161d80c83
15c65cbeed
hex7e8bf3c3

2123101123 has 16 divisors (see below), whose sum is σ = 2574738432. Its totient is φ = 1724148000.

The previous prime is 2123101069. The next prime is 2123101139. The reversal of 2123101123 is 3211013212.

It is a cyclic number.

It is not a de Polignac number, because 2123101123 - 29 = 2123100611 is a prime.

It is a super-2 number, since 2×21231011232 = 9015116756967722258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123101097 and 2123101106.

It is not an unprimeable number, because it can be changed into a prime (2123105123) 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, 235033 + ... + 243898.

It is an arithmetic number, because the mean of its divisors is an integer number (160921152).

Almost surely, 22123101123 is an apocalyptic number.

2123101123 is a deficient number, since it is larger than the sum of its proper divisors (451637309).

2123101123 is a wasteful number, since it uses less digits than its factorization.

2123101123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478986.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2123101123 is about 46077.1214704217. The cubic root of 2123101123 is about 1285.2577363075.

Adding to 2123101123 its reverse (3211013212), we get a palindrome (5334114335).

The spelling of 2123101123 in words is "two billion, one hundred twenty-three million, one hundred one thousand, one hundred twenty-three".

Divisors: 1 11 13 31 143 341 403 4433 478931 5268241 6226103 14846861 68487133 163315471 193009193 2123101123