21100220201211 has 64 divisors (see below), whose sum is σ = 29432157511680. Its totient is φ = 13434051496320.

The previous prime is 21100220201117. The next prime is 21100220201227. The reversal of 21100220201211 is 11210202200112.

It is not a de Polignac number, because 21100220201211 - 2³¹ = 21098072717563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100220201111) 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, 3002731680 + ... + 3002738706.

It is an arithmetic number, because the mean of its divisors is an integer number (459877461120).

Almost surely, 2^{21100220201211} is an apocalyptic number.

21100220201211 is a deficient number, since it is larger than the sum of its proper divisors (8331937310469).

21100220201211 is a wasteful number, since it uses less digits than its factorization.

21100220201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8576.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21100220201211 its reverse (11210202200112), we get a palindrome (32310422401323).

The spelling of 21100220201211 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, two hundred one thousand, two hundred eleven".