21102021102211 has 48 divisors (see below), whose sum is σ = 25526706508800. Its totient is φ = 17084695757184.

The previous prime is 21102021102179. The next prime is 21102021102263. The reversal of 21102021102211 is 11220112020112.

It is not a de Polignac number, because 21102021102211 - 2⁵ = 21102021102179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21102021102011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 259328550 + ... + 259409908.

It is an arithmetic number, because the mean of its divisors is an integer number (531806385600).

Almost surely, 2^{21102021102211} is an apocalyptic number.

21102021102211 is a deficient number, since it is larger than the sum of its proper divisors (4424685406589).

21102021102211 is an equidigital number, since it uses as much as digits as its factorization.

21102021102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82288 (or 82265 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21102021102211 its reverse (11220112020112), we get a palindrome (32322133122323).

The spelling of 21102021102211 in words is "twenty-one trillion, one hundred two billion, twenty-one million, one hundred two thousand, two hundred eleven".