Search a number
1112202221 = 131931145253
BaseRepresentation
bin100001001001010…
…1101101111101101
32212111210201121212
41002102231233231
54234210432341
6302210204205
736363364034
oct10222555755
92774721555
101112202221
11520899a99
12270583665
13149563a30
14a79d771b
15679965eb

1112202221 has 16 divisors (see below), whose sum is σ = 1301475840. Its totient is φ = 941232960.

The previous prime is 1112202209. The next prime is 1112202233. The reversal of 1112202221 is 1222022111.

It is an interprime number because it is at equal distance from previous prime (1112202209) and next prime (1112202233).

It is a cyclic number.

It is not a de Polignac number, because 1112202221 - 218 = 1111940077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112202196 and 1112202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112202251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64970 + ... + 80283.

It is an arithmetic number, because the mean of its divisors is an integer number (81342240).

Almost surely, 21112202221 is an apocalyptic number.

It is an amenable number.

1112202221 is a deficient number, since it is larger than the sum of its proper divisors (189273619).

1112202221 is a wasteful number, since it uses less digits than its factorization.

1112202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145316.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1112202221 is about 33349.6959656306. The cubic root of 1112202221 is about 1036.0830909465.

Adding to 1112202221 its reverse (1222022111), we get a palindrome (2334224332).

The spelling of 1112202221 in words is "one billion, one hundred twelve million, two hundred two thousand, two hundred twenty-one".