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21311020301 = 291017275869
BaseRepresentation
bin10011110110001111…
…000101110100001101
32001000012110000000012
4103312033011310031
5322121110122201
613442401043005
71353051453344
oct236617056415
961005400005
1021311020301
119046573a7a
124169026465
1320181a09ac
141062474b5b
1584add65bb
hex4f63c5d0d

21311020301 has 8 divisors (see below), whose sum is σ = 22264162200. Its totient is φ = 20372430400.

The previous prime is 21311020253. The next prime is 21311020309. The reversal of 21311020301 is 10302011312.

It can be written as a sum of positive squares in 4 ways, for example, as 2301504676 + 19009515625 = 47974^2 + 137875^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2k-21311020301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311020309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3635006 + ... + 3640863.

It is an arithmetic number, because the mean of its divisors is an integer number (2783020275).

Almost surely, 221311020301 is an apocalyptic number.

It is an amenable number.

21311020301 is a deficient number, since it is larger than the sum of its proper divisors (953141899).

21311020301 is a wasteful number, since it uses less digits than its factorization.

21311020301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7275999.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21311020301 its reverse (10302011312), we get a palindrome (31613031613).

The spelling of 21311020301 in words is "twenty-one billion, three hundred eleven million, twenty thousand, three hundred one".

Divisors: 1 29 101 2929 7275869 211000201 734862769 21311020301