1131321294821 has 2 divisors, whose sum is σ = 1131321294822. Its totient is φ = 1131321294820.

The previous prime is 1131321294797. The next prime is 1131321294869. The reversal of 1131321294821 is 1284921231311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 826380993025 + 304940301796 = 909055^2 + 552214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131321294821 - 2²² = 1131317100517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131321294121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565660647410 + 565660647411.

It is an arithmetic number, because the mean of its divisors is an integer number (565660647411).

Almost surely, 2^{1131321294821} is an apocalyptic number.

It is an amenable number.

1131321294821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131321294821 is an equidigital number, since it uses as much as digits as its factorization.

1131321294821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The spelling of 1131321294821 in words is "one trillion, one hundred thirty-one billion, three hundred twenty-one million, two hundred ninety-four thousand, eight hundred twenty-one".