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BaseRepresentation
bin1001101001010011000100…
…11011111111000011111001
32210002200020022021212021102
410310221202123333003321
510240001442200323001
6113035455324221145
74316246346261221
oct464514233770371
983080208255242
1021210200011001
116838216a59391
12246681909a7b5
13bab161b481c1
145348172d1081
hex134a626ff0f9

21210200011001 has 4 divisors (see below), whose sum is σ = 21229429567872. Its totient is φ = 21190970454132.

The previous prime is 21210200010971. The next prime is 21210200011051. The reversal of 21210200011001 is 10011000201212.

Adding to 21210200011001 its reverse (10011000201212), we get a palindrome (31221200212213).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-21210200011001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210200011051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9614776781 + ... + 9614778986.

It is an arithmetic number, because the mean of its divisors is an integer number (5307357391968).

Almost surely, 221210200011001 is an apocalyptic number.

It is an amenable number.

21210200011001 is a deficient number, since it is larger than the sum of its proper divisors (19229556871).

21210200011001 is a wasteful number, since it uses less digits than its factorization.

21210200011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19229556870.

The product of its (nonzero) digits is 8, while the sum is 11.

The spelling of 21210200011001 in words is "twenty-one trillion, two hundred ten billion, two hundred million, eleven thousand, one".

Divisors: 1 1103 19229555767 21210200011001