21010001201211 has 32 divisors (see below), whose sum is σ = 31446190434816. Its totient is φ = 12365409888000.

The previous prime is 21010001201153. The next prime is 21010001201279. The reversal of 21010001201211 is 11210210001012.

It is not a de Polignac number, because 21010001201211 - 2⁷ = 21010001201083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010001201911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15877495 + ... + 17149776.

It is an arithmetic number, because the mean of its divisors is an integer number (982693451088).

Almost surely, 2^{21010001201211} is an apocalyptic number.

21010001201211 is a deficient number, since it is larger than the sum of its proper divisors (10436189233605).

21010001201211 is a wasteful number, since it uses less digits than its factorization.

21010001201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33027843.

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

Adding to 21010001201211 its reverse (11210210001012), we get a palindrome (32220211202223).

It can be divided in two parts, 21010001 and 201211, that added together give a palindrome (21211212).

The spelling of 21010001201211 in words is "twenty-one trillion, ten billion, one million, two hundred one thousand, two hundred eleven".