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21621212230363 is a prime number
BaseRepresentation
bin1001110101010000101001…
…01011001011001011011011
32211112222010110021221022121
410322220110223023023123
510313220220312332423
6113552351530402111
74361036536430104
oct472502453131333
984488113257277
1021621212230363
116986560705119
122512404290337
13c0ab43a9b975
1454a687c253ab
1527763d83a45d
hex13aa14acb2db

21621212230363 has 2 divisors, whose sum is σ = 21621212230364. Its totient is φ = 21621212230362.

The previous prime is 21621212230313. The next prime is 21621212230427. The reversal of 21621212230363 is 36303221212612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-21621212230363 is a prime.

It is a super-2 number, since 2×216212122303632 (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21621212230313) 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, 10810606115181 + 10810606115182.

It is an arithmetic number, because the mean of its divisors is an integer number (10810606115182).

Almost surely, 221621212230363 is an apocalyptic number.

21621212230363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21621212230363 is an equidigital number, since it uses as much as digits as its factorization.

21621212230363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 21621212230363 its reverse (36303221212612), we get a palindrome (57924433442975).

The spelling of 21621212230363 in words is "twenty-one trillion, six hundred twenty-one billion, two hundred twelve million, two hundred thirty thousand, three hundred sixty-three".