21011000201211 has 16 divisors (see below), whose sum is σ = 28795776831008. Its totient is φ = 13617408960000.

The previous prime is 21011000201197. The next prime is 21011000201221. The reversal of 21011000201211 is 11210200011012.

It is not a de Polignac number, because 21011000201211 - 2²⁹ = 21010463330299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011000201221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78671140 + ... + 78937761.

It is an arithmetic number, because the mean of its divisors is an integer number (1799736051938).

Almost surely, 2^{21011000201211} is an apocalyptic number.

21011000201211 is a deficient number, since it is larger than the sum of its proper divisors (7784776629797).

21011000201211 is a wasteful number, since it uses less digits than its factorization.

21011000201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157610142.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21011000201211 its reverse (11210200011012), we get a palindrome (32221200212223).

The spelling of 21011000201211 in words is "twenty-one trillion, eleven billion, two hundred one thousand, two hundred eleven".