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21201000001 = 412287226103
BaseRepresentation
bin10011101111101011…
…011001011001000001
32000201112102101112021
4103233223121121001
5321404424000001
613423431001441
71350244345426
oct235753313101
960645371467
1021201000001
118a9a459105
124138209281
131ccb45c31c
1410519d5d4d
15841402ba1
hex4efad9641

21201000001 has 8 divisors (see below), whose sum is σ = 21727689984. Its totient is φ = 20674766880.

The previous prime is 21200999993. The next prime is 21201000011. The reversal of 21201000001 is 10000010212.

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

It is a cyclic number.

It is not a de Polignac number, because 21201000001 - 23 = 21200999993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201000011) 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, 19285 + ... + 206818.

It is an arithmetic number, because the mean of its divisors is an integer number (2715961248).

Almost surely, 221201000001 is an apocalyptic number.

It is an amenable number.

21201000001 is a deficient number, since it is larger than the sum of its proper divisors (526689983).

21201000001 is a wasteful number, since it uses less digits than its factorization.

21201000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228431.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 21201000001 its reverse (10000010212), we get a palindrome (31201010213).

The spelling of 21201000001 in words is "twenty-one billion, two hundred one million, one", and thus it is an aban number.

Divisors: 1 41 2287 93767 226103 9270223 517097561 21201000001