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21023010300181 is a prime number
BaseRepresentation
bin1001100011110110011010…
…00011111010000100010101
32202102210001201211021220211
410301323031003322010111
510223420111114101211
6112413500531125421
74266601536060121
oct461731503720425
982383051737824
1021023010300181
11677589927803a
122436497743871
13b965cc806ac6
1452973a6b4581
15266ccb793e21
hex131ecd0fa115

21023010300181 has 2 divisors, whose sum is σ = 21023010300182. Its totient is φ = 21023010300180.

The previous prime is 21023010300167. The next prime is 21023010300239. The reversal of 21023010300181 is 18100301032012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19860837902500 + 1162172397681 = 4456550^2 + 1078041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-21023010300181 is a prime.

It is a super-2 number, since 2×210230103001812 (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21023010330181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511505150090 + 10511505150091.

It is an arithmetic number, because the mean of its divisors is an integer number (10511505150091).

Almost surely, 221023010300181 is an apocalyptic number.

It is an amenable number.

21023010300181 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023010300181 is an equidigital number, since it uses as much as digits as its factorization.

21023010300181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21023010300181 its reverse (18100301032012), we get a palindrome (39123311332193).

The spelling of 21023010300181 in words is "twenty-one trillion, twenty-three billion, ten million, three hundred thousand, one hundred eighty-one".