2011323331121 has 4 divisors (see below), whose sum is σ = 2166040510452. Its totient is φ = 1856606151792.

The previous prime is 2011323331099. The next prime is 2011323331141. The reversal of 2011323331121 is 1211333231102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1263679498225 + 747643832896 = 1124135^2 + 864664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011323331121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2011323331141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77358589646 + ... + 77358589671.

It is an arithmetic number, because the mean of its divisors is an integer number (541510127613).

Almost surely, 2^{2011323331121} is an apocalyptic number.

It is an amenable number.

2011323331121 is a deficient number, since it is larger than the sum of its proper divisors (154717179331).

2011323331121 is a wasteful number, since it uses less digits than its factorization.

2011323331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154717179330.

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

Adding to 2011323331121 its reverse (1211333231102), we get a palindrome (3222656562223).

The spelling of 2011323331121 in words is "two trillion, eleven billion, three hundred twenty-three million, three hundred thirty-one thousand, one hundred twenty-one".