1021312231987 has 2 divisors, whose sum is σ = 1021312231988. Its totient is φ = 1021312231986.

The previous prime is 1021312231981. The next prime is 1021312232053. The reversal of 1021312231987 is 7891322131201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021312231987 - 2³⁵ = 986952493619 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021312231981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510656115993 + 510656115994.

It is an arithmetic number, because the mean of its divisors is an integer number (510656115994).

Almost surely, 2^{1021312231987} is an apocalyptic number.

1021312231987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021312231987 is an equidigital number, since it uses as much as digits as its factorization.

1021312231987 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 40.

The spelling of 1021312231987 in words is "one trillion, twenty-one billion, three hundred twelve million, two hundred thirty-one thousand, nine hundred eighty-seven".