1211111321087 has 2 divisors, whose sum is σ = 1211111321088. Its totient is φ = 1211111321086.

The previous prime is 1211111321083. The next prime is 1211111321143. The reversal of 1211111321087 is 7801231111121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211111321087 - 2² = 1211111321083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211111321081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605555660543 + 605555660544.

It is an arithmetic number, because the mean of its divisors is an integer number (605555660544).

Almost surely, 2^{1211111321087} is an apocalyptic number.

1211111321087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211111321087 is an equidigital number, since it uses as much as digits as its factorization.

1211111321087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 29.

The spelling of 1211111321087 in words is "one trillion, two hundred eleven billion, one hundred eleven million, three hundred twenty-one thousand, eighty-seven".