21100223211011 has 4 divisors (see below), whose sum is σ = 24114540812592. Its totient is φ = 18085905609432.

The previous prime is 21100223211007. The next prime is 21100223211017. The reversal of 21100223211011 is 11011232200112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21100223211011 - 2² = 21100223211007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100223211017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1507158800780 + ... + 1507158800793.

It is an arithmetic number, because the mean of its divisors is an integer number (6028635203148).

Almost surely, 2^{21100223211011} is an apocalyptic number.

21100223211011 is a deficient number, since it is larger than the sum of its proper divisors (3014317601581).

21100223211011 is an equidigital number, since it uses as much as digits as its factorization.

21100223211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014317601580.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21100223211011 its reverse (11011232200112), we get a palindrome (32111455411123).

The spelling of 21100223211011 in words is "twenty-one trillion, one hundred billion, two hundred twenty-three million, two hundred eleven thousand, eleven".