21100113321311 has 8 divisors (see below), whose sum is σ = 22372767104880. Its totient is φ = 19843671688128.

The previous prime is 21100113321289. The next prime is 21100113321319. The reversal of 21100113321311 is 11312331100112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100113321311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100113321319) 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, 4053034916 + ... + 4053040121.

It is an arithmetic number, because the mean of its divisors is an integer number (2796595888110).

Almost surely, 2^{21100113321311} is an apocalyptic number.

21100113321311 is a deficient number, since it is larger than the sum of its proper divisors (1272653783569).

21100113321311 is a wasteful number, since it uses less digits than its factorization.

21100113321311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8106075193.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 21100113321311 its reverse (11312331100112), we get a palindrome (32412444421423).

The spelling of 21100113321311 in words is "twenty-one trillion, one hundred billion, one hundred thirteen million, three hundred twenty-one thousand, three hundred eleven".