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11020021121221 = 72224898390229
BaseRepresentation
bin1010000001011100110001…
…1100011100000011000101
31110000111121012221000102121
42200113030130130003011
52421023000401334341
635234310001405541
72215112252666200
oct240271434340305
943014535830377
1011020021121221
1135696236a4692
12129b9069398b1
1361c2502b5548
142a152c598937
151419c91e84d1
hexa05cc71c0c5

11020021121221 has 6 divisors (see below), whose sum is σ = 12819208243110. Its totient is φ = 9445732389576.

The previous prime is 11020021121209. The next prime is 11020021121303. The reversal of 11020021121221 is 12212112002011.

It can be written as a sum of positive squares in only one way, i.e., 11019810552100 + 210569121 = 3319610^2 + 14511^2 .

It is not a de Polignac number, because 11020021121221 - 25 = 11020021121189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11020021121195 and 11020021121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020021121201) 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, 112449195066 + ... + 112449195163.

It is an arithmetic number, because the mean of its divisors is an integer number (2136534707185).

Almost surely, 211020021121221 is an apocalyptic number.

It is an amenable number.

11020021121221 is a deficient number, since it is larger than the sum of its proper divisors (1799187121889).

11020021121221 is an equidigital number, since it uses as much as digits as its factorization.

11020021121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224898390243 (or 224898390236 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11020021121221 its reverse (12212112002011), we get a palindrome (23232133123232).

The spelling of 11020021121221 in words is "eleven trillion, twenty billion, twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".

Divisors: 1 7 49 224898390229 1574288731603 11020021121221