1002021109877 has 2 divisors, whose sum is σ = 1002021109878. Its totient is φ = 1002021109876.

The previous prime is 1002021109823. The next prime is 1002021109993. The reversal of 1002021109877 is 7789011202001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 823944705796 + 178076404081 = 907714^2 + 421991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002021109877 - 2¹² = 1002021105781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1002021109877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002021109277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501010554938 + 501010554939.

It is an arithmetic number, because the mean of its divisors is an integer number (501010554939).

Almost surely, 2^{1002021109877} is an apocalyptic number.

It is an amenable number.

1002021109877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002021109877 is an equidigital number, since it uses as much as digits as its factorization.

1002021109877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 38.

The spelling of 1002021109877 in words is "one trillion, two billion, twenty-one million, one hundred nine thousand, eight hundred seventy-seven".