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21110029 is a prime number
BaseRepresentation
bin101000010000…
…1110100001101
31110201111111221
41100201310031
520401010104
62032243341
7344301163
oct120416415
943644457
1021110029
1110a09306
1270a0551
1344b1755
142b37233
151cbec54
hex1421d0d

21110029 has 2 divisors, whose sum is σ = 21110030. Its totient is φ = 21110028.

The previous prime is 21110027. The next prime is 21110041. The reversal of 21110029 is 92001112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11356900 + 9753129 = 3370^2 + 3123^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110029 - 21 = 21110027 is a prime.

Together with 21110027, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21109994 and 21110021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555014 + 10555015.

It is an arithmetic number, because the mean of its divisors is an integer number (10555015).

Almost surely, 221110029 is an apocalyptic number.

It is an amenable number.

21110029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110029 is an equidigital number, since it uses as much as digits as its factorization.

21110029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 21110029 is about 4594.5651589677. The cubic root of 21110029 is about 276.3734224604.

The spelling of 21110029 in words is "twenty-one million, one hundred ten thousand, twenty-nine".