121221211022987 has 2 divisors, whose sum is σ = 121221211022988. Its totient is φ = 121221211022986.

The previous prime is 121221211022939. The next prime is 121221211023049. The reversal of 121221211022987 is 789220112122121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121221211022987 - 2²⁸ = 121220942587531 is a prime.

It is not a weakly prime, because it can be changed into another prime (121221211022927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610605511493 + 60610605511494.

It is an arithmetic number, because the mean of its divisors is an integer number (60610605511494).

Almost surely, 2^{121221211022987} is an apocalyptic number.

121221211022987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221211022987 is an equidigital number, since it uses as much as digits as its factorization.

121221211022987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 41.

The spelling of 121221211022987 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred eleven million, twenty-two thousand, nine hundred eighty-seven".