1212120587911 has 2 divisors, whose sum is σ = 1212120587912. Its totient is φ = 1212120587910.

The previous prime is 1212120587903. The next prime is 1212120587917. The reversal of 1212120587911 is 1197850212121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1197850212121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212120587911 - 2³ = 1212120587903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212120587917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606060293955 + 606060293956.

It is an arithmetic number, because the mean of its divisors is an integer number (606060293956).

Almost surely, 2^{1212120587911} is an apocalyptic number.

1212120587911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212120587911 is an equidigital number, since it uses as much as digits as its factorization.

1212120587911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 40.

The spelling of 1212120587911 in words is "one trillion, two hundred twelve billion, one hundred twenty million, five hundred eighty-seven thousand, nine hundred eleven".