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1122011111 = 1326639119
BaseRepresentation
bin100001011100000…
…1000011111100111
32220012021001220002
41002320020133213
54244213323421
6303200331515
736542636264
oct10270103747
92805231802
101122011111
11526389611
12273913b9b
1314b5b9600
14a902c26b
1568782b0b
hex42e087e7

1122011111 has 6 divisors (see below), whose sum is σ = 1214958960. Its totient is φ = 1035702408.

The previous prime is 1122011089. The next prime is 1122011129. The reversal of 1122011111 is 1111102211.

It is a de Polignac number, because none of the positive numbers 2k-1122011111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122011092 and 1122011101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122011411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3319391 + ... + 3319728.

It is an arithmetic number, because the mean of its divisors is an integer number (202493160).

Almost surely, 21122011111 is an apocalyptic number.

1122011111 is a deficient number, since it is larger than the sum of its proper divisors (92947849).

1122011111 is an equidigital number, since it uses as much as digits as its factorization.

1122011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6639145 (or 6639132 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1122011111 is about 33496.4343027732. The cubic root of 1122011111 is about 1039.1200369071.

Adding to 1122011111 its reverse (1111102211), we get a palindrome (2233113322).

The spelling of 1122011111 in words is "one billion, one hundred twenty-two million, eleven thousand, one hundred eleven".

Divisors: 1 13 169 6639119 86308547 1122011111