1212201010187 has 2 divisors, whose sum is σ = 1212201010188. Its totient is φ = 1212201010186.

The previous prime is 1212201010171. The next prime is 1212201010201. The reversal of 1212201010187 is 7810101022121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212201010187 - 2⁴ = 1212201010171 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212201010117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606100505093 + 606100505094.

It is an arithmetic number, because the mean of its divisors is an integer number (606100505094).

Almost surely, 2^{1212201010187} is an apocalyptic number.

1212201010187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212201010187 is an equidigital number, since it uses as much as digits as its factorization.

1212201010187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 26.

The spelling of 1212201010187 in words is "one trillion, two hundred twelve billion, two hundred one million, ten thousand, one hundred eighty-seven".