21330003131211 has 4 divisors (see below), whose sum is σ = 28440004174952. Its totient is φ = 14220002087472.

The previous prime is 21330003131183. The next prime is 21330003131291. The reversal of 21330003131211 is 11213130003312.

It is a happy number.

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

It is not a de Polignac number, because 21330003131211 - 2¹⁷ = 21330003000139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330003131291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3555000521866 + ... + 3555000521871.

It is an arithmetic number, because the mean of its divisors is an integer number (7110001043738).

Almost surely, 2^{21330003131211} is an apocalyptic number.

21330003131211 is a deficient number, since it is larger than the sum of its proper divisors (7110001043741).

21330003131211 is an equidigital number, since it uses as much as digits as its factorization.

21330003131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7110001043740.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21330003131211 its reverse (11213130003312), we get a palindrome (32543133134523).

The spelling of 21330003131211 in words is "twenty-one trillion, three hundred thirty billion, three million, one hundred thirty-one thousand, two hundred eleven".