21113201203311 has 8 divisors (see below), whose sum is σ = 32172497071744. Its totient is φ = 12064686401880.

The previous prime is 21113201203309. The next prime is 21113201203319. The reversal of 21113201203311 is 11330210231112.

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

It is not a de Polignac number, because 21113201203311 - 2¹ = 21113201203309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1005390533491 = 21113201203311 / (2 + 1 + 1 + 1 + 3 + 2 + 0 + 1 + 2 + 0 + 3 + 3 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113201203319) 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, 502695266725 + ... + 502695266766.

It is an arithmetic number, because the mean of its divisors is an integer number (4021562133968).

Almost surely, 2^{21113201203311} is an apocalyptic number.

21113201203311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21113201203311 is a deficient number, since it is larger than the sum of its proper divisors (11059295868433).

21113201203311 is a wasteful number, since it uses less digits than its factorization.

21113201203311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005390533501.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21113201203311 its reverse (11330210231112), we get a palindrome (32443411434423).

The spelling of 21113201203311 in words is "twenty-one trillion, one hundred thirteen billion, two hundred one million, two hundred three thousand, three hundred eleven".