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1123204221 = 32124800469
BaseRepresentation
bin100001011110010…
…1011110001111101
32220021111200112100
41002330223301331
54300020013341
6303242055313
736556035606
oct10274536175
92807450470
101123204221
11527023a57
122741aa539
1314b9166a9
14a925cdad
156891b3b6
hex42f2bc7d

1123204221 has 6 divisors (see below), whose sum is σ = 1622406110. Its totient is φ = 748802808.

The previous prime is 1123204217. The next prime is 1123204231. The reversal of 1123204221 is 1224023211.

It is a happy number.

1123204221 is a `hidden beast` number, since 11 + 232 + 0 + 422 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1023104196 + 100100025 = 31986^2 + 10005^2 .

It is not a de Polignac number, because 1123204221 - 22 = 1123204217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1123204194 and 1123204203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123204211) 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, 62400226 + ... + 62400243.

Almost surely, 21123204221 is an apocalyptic number.

It is an amenable number.

1123204221 is a deficient number, since it is larger than the sum of its proper divisors (499201889).

1123204221 is a wasteful number, since it uses less digits than its factorization.

1123204221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124800475 (or 124800472 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1123204221 is about 33514.2390783380. The cubic root of 1123204221 is about 1039.4882285425.

Adding to 1123204221 its reverse (1224023211), we get a palindrome (2347227432).

The spelling of 1123204221 in words is "one billion, one hundred twenty-three million, two hundred four thousand, two hundred twenty-one".

Divisors: 1 3 9 124800469 374401407 1123204221