1231112111321 has 2 divisors, whose sum is σ = 1231112111322. Its totient is φ = 1231112111320.

The previous prime is 1231112111267. The next prime is 1231112111363.

1231112111321 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632947536400 + 598164574921 = 795580^2 + 773411^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1231112111321 - 2³⁸ = 956234204377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231112111293 and 1231112111302.

It is not a weakly prime, because it can be changed into another prime (1231112191321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615556055660 + 615556055661.

It is an arithmetic number, because the mean of its divisors is an integer number (615556055661).

Almost surely, 2^{1231112111321} is an apocalyptic number.

It is an amenable number.

1231112111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231112111321 is an equidigital number, since it uses as much as digits as its factorization.

1231112111321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 20.

The spelling of 1231112111321 in words is "one trillion, two hundred thirty-one billion, one hundred twelve million, one hundred eleven thousand, three hundred twenty-one".