1311054421 has 2 divisors, whose sum is σ = 1311054422. Its totient is φ = 1311054420.

The previous prime is 1311054389. The next prime is 1311054439. The reversal of 1311054421 is 1244501131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 869424196 + 441630225 = 29486^2 + 21015^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311054421 - 2⁵ = 1311054389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311054392 and 1311054401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311054491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655527210 + 655527211.

It is an arithmetic number, because the mean of its divisors is an integer number (655527211).

Almost surely, 2^1311054421 is an apocalyptic number.

It is an amenable number.

1311054421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311054421 is an equidigital number, since it uses as much as digits as its factorization.

1311054421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1311054421 is about 36208.4854833781. The cubic root of 1311054421 is about 1094.4776728064.

Adding to 1311054421 its reverse (1244501131), we get a palindrome (2555555552).

The spelling of 1311054421 in words is "one billion, three hundred eleven million, fifty-four thousand, four hundred twenty-one".