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21202022117 is a prime number
BaseRepresentation
bin10011101111101111…
…010010111011100101
32000201121100022121102
4103233233102323211
5321410204201432
613423504525445
71350256133363
oct235757227345
960647308542
1021202022117
118a9aa97031
124138620885
131ccb729623
141051bc0633
15841555962
hex4efbd2ee5

21202022117 has 2 divisors, whose sum is σ = 21202022118. Its totient is φ = 21202022116.

The previous prime is 21202022071. The next prime is 21202022147. The reversal of 21202022117 is 71122020212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15707358241 + 5494663876 = 125329^2 + 74126^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202022117 - 212 = 21202018021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202022147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601011058 + 10601011059.

It is an arithmetic number, because the mean of its divisors is an integer number (10601011059).

Almost surely, 221202022117 is an apocalyptic number.

It is an amenable number.

21202022117 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202022117 is an equidigital number, since it uses as much as digits as its factorization.

21202022117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 21202022117 its reverse (71122020212), we get a palindrome (92324042329).

The spelling of 21202022117 in words is "twenty-one billion, two hundred two million, twenty-two thousand, one hundred seventeen".