21100243211211 has 8 divisors (see below), whose sum is σ = 28133819400400. Its totient is φ = 14066747914752.

The previous prime is 21100243211209. The next prime is 21100243211213. The reversal of 21100243211211 is 11211234200112.

It is an interprime number because it is at equal distance from previous prime (21100243211209) and next prime (21100243211213).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21100243211211 - 2¹ = 21100243211209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100243211213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19611910 + ... + 20659803.

It is an arithmetic number, because the mean of its divisors is an integer number (3516727425050).

Almost surely, 2^{21100243211211} is an apocalyptic number.

21100243211211 is a deficient number, since it is larger than the sum of its proper divisors (7033576189189).

21100243211211 is a wasteful number, since it uses less digits than its factorization.

21100243211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40446365.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 21100243211211 its reverse (11211234200112), we get a palindrome (32311477411323).

It can be divided in two parts, 2110024 and 3211211, that added together give a palindrome (5321235).

The spelling of 21100243211211 in words is "twenty-one trillion, one hundred billion, two hundred forty-three million, two hundred eleven thousand, two hundred eleven".