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11012121 = 321223569
BaseRepresentation
bin101010000000…
…100000011001
3202201110210100
4222000200121
510304341441
61032010013
7162413211
oct52004031
922643710
1011012121
11624162a
123830909
132387463
141669241
15e77cb6
hexa80819

11012121 has 6 divisors (see below), whose sum is σ = 15906410. Its totient is φ = 7341408.

The previous prime is 11012093. The next prime is 11012129. The reversal of 11012121 is 12121011.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8643600 + 2368521 = 2940^2 + 1539^2 .

It is not a de Polignac number, because 11012121 - 27 = 11011993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1223569 = 11012121 / (1 + 1 + 0 + 1 + 2 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11012129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 611776 + ... + 611793.

Almost surely, 211012121 is an apocalyptic number.

It is an amenable number.

11012121 is a deficient number, since it is larger than the sum of its proper divisors (4894289).

11012121 is a wasteful number, since it uses less digits than its factorization.

11012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223575 (or 1223572 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 11012121 is about 3318.4515967541. The cubic root of 11012121 is about 222.4796665339.

Adding to 11012121 its reverse (12121011), we get a palindrome (23133132).

The spelling of 11012121 in words is "eleven million, twelve thousand, one hundred twenty-one".

Divisors: 1 3 9 1223569 3670707 11012121