21110012012211 has 32 divisors (see below), whose sum is σ = 29893980331008. Its totient is φ = 13204837416960.

The previous prime is 21110012012189. The next prime is 21110012012263. The reversal of 21110012012211 is 11221021001112.

It is a happy number.

It is not a de Polignac number, because 21110012012211 - 2¹⁹ = 21110011487923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110012012281) 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, 23982451 + ... + 24847091.

It is an arithmetic number, because the mean of its divisors is an integer number (934186885344).

Almost surely, 2^{21110012012211} is an apocalyptic number.

21110012012211 is a deficient number, since it is larger than the sum of its proper divisors (8783968318797).

21110012012211 is a wasteful number, since it uses less digits than its factorization.

21110012012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866131.

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

Adding to 21110012012211 its reverse (11221021001112), we get a palindrome (32331033013323).

The spelling of 21110012012211 in words is "twenty-one trillion, one hundred ten billion, twelve million, twelve thousand, two hundred eleven".