2120231131321 has 8 divisors (see below), whose sum is σ = 2247869935080. Its totient is φ = 1992916697088.

The previous prime is 2120231131279. The next prime is 2120231131373. The reversal of 2120231131321 is 1231311320212.

It can be written as a sum of positive squares in 4 ways, for example, as 657072360000 + 1463158771321 = 810600^2 + 1209611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2120231131321 - 2¹⁷ = 2120231000249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120231131292 and 2120231131301.

It is not an unprimeable number, because it can be changed into a prime (2120231131391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81078916 + ... + 81105061.

It is an arithmetic number, because the mean of its divisors is an integer number (280983741885).

Almost surely, 2^{2120231131321} is an apocalyptic number.

It is an amenable number.

2120231131321 is a deficient number, since it is larger than the sum of its proper divisors (127638803759).

2120231131321 is a wasteful number, since it uses less digits than its factorization.

2120231131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162184763.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2120231131321 its reverse (1231311320212), we get a palindrome (3351542451533).

The spelling of 2120231131321 in words is "two trillion, one hundred twenty billion, two hundred thirty-one million, one hundred thirty-one thousand, three hundred twenty-one".