21331021130011 has 4 divisors (see below), whose sum is σ = 22066573582800. Its totient is φ = 20595468677224.

The previous prime is 21331021129997. The next prime is 21331021130033. The reversal of 21331021130011 is 11003112013312.

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 21331021130011 - 2³⁷ = 21193582176539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21331021530011) 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, 367776226351 + ... + 367776226408.

It is an arithmetic number, because the mean of its divisors is an integer number (5516643395700).

Almost surely, 2^{21331021130011} is an apocalyptic number.

21331021130011 is a deficient number, since it is larger than the sum of its proper divisors (735552452789).

21331021130011 is an equidigital number, since it uses as much as digits as its factorization.

21331021130011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735552452788.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21331021130011 its reverse (11003112013312), we get a palindrome (32334133143323).

The spelling of 21331021130011 in words is "twenty-one trillion, three hundred thirty-one billion, twenty-one million, one hundred thirty thousand, eleven".