21010100201211 has 64 divisors (see below), whose sum is σ = 32167573143552. Its totient is φ = 12081137040000.

The previous prime is 21010100201201. The next prime is 21010100201263. The reversal of 21010100201211 is 11210200101012.

It is not a de Polignac number, because 21010100201211 - 2⁹ = 21010100200699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010100201201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18609376 + ... + 19706066.

It is an arithmetic number, because the mean of its divisors is an integer number (502618330368).

Almost surely, 2^{21010100201211} is an apocalyptic number.

21010100201211 is a deficient number, since it is larger than the sum of its proper divisors (11157472942341).

21010100201211 is a wasteful number, since it uses less digits than its factorization.

21010100201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097104.

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

Adding to 21010100201211 its reverse (11210200101012), we get a palindrome (32220300302223).

The spelling of 21010100201211 in words is "twenty-one trillion, ten billion, one hundred million, two hundred one thousand, two hundred eleven".