2731103251321 has 2 divisors, whose sum is σ = 2731103251322. Its totient is φ = 2731103251320.

The previous prime is 2731103251313. The next prime is 2731103251333. The reversal of 2731103251321 is 1231523011372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1830435820096 + 900667431225 = 1352936^2 + 949035^2 .

It is a cyclic number.

It is not a de Polignac number, because 2731103251321 - 2³ = 2731103251313 is a prime.

It is a super-2 number, since 2×2731103251321² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2731103251381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365551625660 + 1365551625661.

It is an arithmetic number, because the mean of its divisors is an integer number (1365551625661).

Almost surely, 2^{2731103251321} is an apocalyptic number.

It is an amenable number.

2731103251321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731103251321 is an equidigital number, since it uses as much as digits as its factorization.

2731103251321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

Adding to 2731103251321 its reverse (1231523011372), we get a palindrome (3962626262693).

The spelling of 2731103251321 in words is "two trillion, seven hundred thirty-one billion, one hundred three million, two hundred fifty-one thousand, three hundred twenty-one".