21021201110211 has 32 divisors (see below), whose sum is σ = 28245611761920. Its totient is φ = 13905806964864.

The previous prime is 21021201110191. The next prime is 21021201110233. The reversal of 21021201110211 is 11201110212012.

It is a happy number.

It is not a de Polignac number, because 21021201110211 - 2¹³ = 21021201102019 is a prime.

It is a super-2 number, since 2×21021201110211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21021201110411) 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, 573031876 + ... + 573068558.

It is an arithmetic number, because the mean of its divisors is an integer number (882675367560).

Almost surely, 2^{21021201110211} is an apocalyptic number.

21021201110211 is a deficient number, since it is larger than the sum of its proper divisors (7224410651709).

21021201110211 is a wasteful number, since it uses less digits than its factorization.

21021201110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38995.

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

Adding to 21021201110211 its reverse (11201110212012), we get a palindrome (32222311322223).

The spelling of 21021201110211 in words is "twenty-one trillion, twenty-one billion, two hundred one million, one hundred ten thousand, two hundred eleven".