2320111131221 has 4 divisors (see below), whose sum is σ = 2498581218252. Its totient is φ = 2141641044192.

The previous prime is 2320111131157. The next prime is 2320111131263. The reversal of 2320111131221 is 1221311110232.

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 571514832196 + 1748596299025 = 755986^2 + 1322345^2 .

It is not a de Polignac number, because 2320111131221 - 2⁶ = 2320111131157 is a prime.

It is a super-2 number, since 2×2320111131221² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2320111131193 and 2320111131202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2320111134221) 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, 89235043496 + ... + 89235043521.

It is an arithmetic number, because the mean of its divisors is an integer number (624645304563).

Almost surely, 2^{2320111131221} is an apocalyptic number.

It is an amenable number.

2320111131221 is a deficient number, since it is larger than the sum of its proper divisors (178470087031).

2320111131221 is a wasteful number, since it uses less digits than its factorization.

2320111131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178470087030.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2320111131221 its reverse (1221311110232), we get a palindrome (3541422241453).

The spelling of 2320111131221 in words is "two trillion, three hundred twenty billion, one hundred eleven million, one hundred thirty-one thousand, two hundred twenty-one".