21101001012223 has 16 divisors (see below), whose sum is σ = 23072601923712. Its totient is φ = 19138293252000.

The previous prime is 21101001012167. The next prime is 21101001012229. The reversal of 21101001012223 is 32221010010112.

It is a cyclic number.

It is not a de Polignac number, because 21101001012223 - 2²¹ = 21100998915071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21101001012197 and 21101001012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101001012229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88476928 + ... + 88715098.

It is an arithmetic number, because the mean of its divisors is an integer number (1442037620232).

Almost surely, 2^{21101001012223} is an apocalyptic number.

21101001012223 is a deficient number, since it is larger than the sum of its proper divisors (1971600911489).

21101001012223 is a wasteful number, since it uses less digits than its factorization.

21101001012223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256806.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21101001012223 its reverse (32221010010112), we get a palindrome (53322011022335).

The spelling of 21101001012223 in words is "twenty-one trillion, one hundred one billion, one million, twelve thousand, two hundred twenty-three".