1321787011 has 2 divisors, whose sum is σ = 1321787012. Its totient is φ = 1321787010.

The previous prime is 1321786937. The next prime is 1321787017. The reversal of 1321787011 is 1107871231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321787011 - 2¹¹ = 1321784963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321787017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660893505 + 660893506.

It is an arithmetic number, because the mean of its divisors is an integer number (660893506).

Almost surely, 2^1321787011 is an apocalyptic number.

1321787011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321787011 is an equidigital number, since it uses as much as digits as its factorization.

1321787011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 31.

The square root of 1321787011 is about 36356.3888608316. The cubic root of 1321787011 is about 1097.4561079577.

The spelling of 1321787011 in words is "one billion, three hundred twenty-one million, seven hundred eighty-seven thousand, eleven".