2011231331321 has 4 divisors (see below), whose sum is σ = 2035463034192. Its totient is φ = 1986999628452.

The previous prime is 2011231331309. The next prime is 2011231331323. The reversal of 2011231331321 is 1231331321102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2011231331321 - 2⁶ = 2011231331257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011231331323) 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, 12115851311 + ... + 12115851476.

It is an arithmetic number, because the mean of its divisors is an integer number (508865758548).

Almost surely, 2^{2011231331321} is an apocalyptic number.

It is an amenable number.

2011231331321 is a deficient number, since it is larger than the sum of its proper divisors (24231702871).

2011231331321 is an equidigital number, since it uses as much as digits as its factorization.

2011231331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24231702870.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 2011231331321 its reverse (1231331321102), we get a palindrome (3242562652423).

The spelling of 2011231331321 in words is "two trillion, eleven billion, two hundred thirty-one million, three hundred thirty-one thousand, three hundred twenty-one".