1231342054321 has 2 divisors, whose sum is σ = 1231342054322. Its totient is φ = 1231342054320.

The previous prime is 1231342054303. The next prime is 1231342054343. The reversal of 1231342054321 is 1234502431321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1135929640000 + 95412414321 = 1065800^2 + 308889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231342054321 - 2⁵ = 1231342054289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231342057321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615671027160 + 615671027161.

It is an arithmetic number, because the mean of its divisors is an integer number (615671027161).

Almost surely, 2^{1231342054321} is an apocalyptic number.

It is an amenable number.

1231342054321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231342054321 is an equidigital number, since it uses as much as digits as its factorization.

1231342054321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 1231342054321 its reverse (1234502431321), we get a palindrome (2465844485642).

The spelling of 1231342054321 in words is "one trillion, two hundred thirty-one billion, three hundred forty-two million, fifty-four thousand, three hundred twenty-one".