2043121221311 has 4 divisors (see below), whose sum is σ = 2043140748000. Its totient is φ = 2043101694624.

The previous prime is 2043121221299. The next prime is 2043121221319. The reversal of 2043121221311 is 1131221213402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2043121221311 is a prime.

It is a super-3 number, since 3×2043121221311³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043121221319) 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, 9605546 + ... + 9815943.

It is an arithmetic number, because the mean of its divisors is an integer number (510785187000).

Almost surely, 2^{2043121221311} is an apocalyptic number.

2043121221311 is a deficient number, since it is larger than the sum of its proper divisors (19526689).

2043121221311 is a wasteful number, since it uses less digits than its factorization.

2043121221311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19526688.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 2043121221311 its reverse (1131221213402), we get a palindrome (3174342434713).

The spelling of 2043121221311 in words is "two trillion, forty-three billion, one hundred twenty-one million, two hundred twenty-one thousand, three hundred eleven".