21211021000201 has 4 divisors (see below), whose sum is σ = 21558742656004. Its totient is φ = 20863299344400.

The previous prime is 21211021000199. The next prime is 21211021000229. The reversal of 21211021000201 is 10200012011212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3937446490000 + 17273574510201 = 1984300^2 + 4156149^2 .

It is a cyclic number.

It is not a de Polignac number, because 21211021000201 - 2¹ = 21211021000199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211021000291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173860827810 + ... + 173860827931.

It is an arithmetic number, because the mean of its divisors is an integer number (5389685664001).

Almost surely, 2^{21211021000201} is an apocalyptic number.

It is an amenable number.

21211021000201 is a deficient number, since it is larger than the sum of its proper divisors (347721655803).

21211021000201 is an equidigital number, since it uses as much as digits as its factorization.

21211021000201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347721655802.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21211021000201 its reverse (10200012011212), we get a palindrome (31411033011413).

The spelling of 21211021000201 in words is "twenty-one trillion, two hundred eleven billion, twenty-one million, two hundred one", and thus it is an aban number.