21012110201211 has 32 divisors (see below), whose sum is σ = 28961825932608. Its totient is φ = 13540225420800.

The previous prime is 21012110201153. The next prime is 21012110201219. The reversal of 21012110201211 is 11210201121012.

It is a happy number.

It is not a de Polignac number, because 21012110201211 - 2⁷ = 21012110201083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012110201219) 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 31 ways as a sum of consecutive naturals, for example, 99245581 + ... + 99457073.

It is an arithmetic number, because the mean of its divisors is an integer number (905057060394).

Almost surely, 2^{21012110201211} is an apocalyptic number.

21012110201211 is a deficient number, since it is larger than the sum of its proper divisors (7949715731397).

21012110201211 is a wasteful number, since it uses less digits than its factorization.

21012110201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217391.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21012110201211 its reverse (11210201121012), we get a palindrome (32222311322223).

The spelling of 21012110201211 in words is "twenty-one trillion, twelve billion, one hundred ten million, two hundred one thousand, two hundred eleven".