1020121120987 has 2 divisors, whose sum is σ = 1020121120988. Its totient is φ = 1020121120986.

The previous prime is 1020121120919. The next prime is 1020121121021. The reversal of 1020121120987 is 7890211210201.

It is an a-pointer prime, because the next prime (1020121121021) can be obtained adding 1020121120987 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020121120987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020121150987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510060560493 + 510060560494.

It is an arithmetic number, because the mean of its divisors is an integer number (510060560494).

Almost surely, 2^{1020121120987} is an apocalyptic number.

1020121120987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020121120987 is an equidigital number, since it uses as much as digits as its factorization.

1020121120987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 1020121120987 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred twenty thousand, nine hundred eighty-seven".