121223230987 has 2 divisors, whose sum is σ = 121223230988. Its totient is φ = 121223230986.

The previous prime is 121223230967. The next prime is 121223231009. The reversal of 121223230987 is 789032322121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121223230987 - 2¹⁹ = 121222706699 is a prime.

It is not a weakly prime, because it can be changed into another prime (121223230967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611615493 + 60611615494.

It is an arithmetic number, because the mean of its divisors is an integer number (60611615494).

Almost surely, 2^121223230987 is an apocalyptic number.

121223230987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121223230987 is an equidigital number, since it uses as much as digits as its factorization.

121223230987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 121223230987 in words is "one hundred twenty-one billion, two hundred twenty-three million, two hundred thirty thousand, nine hundred eighty-seven".