21020001333211 has 4 divisors (see below), whose sum is σ = 21020399047800. Its totient is φ = 21019603618624.

The previous prime is 21020001333209. The next prime is 21020001333223. The reversal of 21020001333211 is 11233310002012.

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

It is a cyclic number.

It is not a de Polignac number, because 21020001333211 - 2¹ = 21020001333209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020001333811) 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, 198778006 + ... + 198883723.

It is an arithmetic number, because the mean of its divisors is an integer number (5255099761950).

Almost surely, 2^{21020001333211} is an apocalyptic number.

21020001333211 is a deficient number, since it is larger than the sum of its proper divisors (397714589).

21020001333211 is an equidigital number, since it uses as much as digits as its factorization.

21020001333211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397714588.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21020001333211 its reverse (11233310002012), we get a palindrome (32253311335223).

The spelling of 21020001333211 in words is "twenty-one trillion, twenty billion, one million, three hundred thirty-three thousand, two hundred eleven".