1212210109987 has 2 divisors, whose sum is σ = 1212210109988. Its totient is φ = 1212210109986.

The previous prime is 1212210109813. The next prime is 1212210110021. The reversal of 1212210109987 is 7899010122121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7899010122121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212210109987 - 2¹⁵ = 1212210077219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212210109687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105054993 + 606105054994.

It is an arithmetic number, because the mean of its divisors is an integer number (606105054994).

Almost surely, 2^{1212210109987} is an apocalyptic number.

1212210109987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212210109987 is an equidigital number, since it uses as much as digits as its factorization.

1212210109987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 43.

The spelling of 1212210109987 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred nine thousand, nine hundred eighty-seven".