1021305502550 has 12 divisors (see below), whose sum is σ = 1899628234836. Its totient is φ = 408522201000.

The previous prime is 1021305502543. The next prime is 1021305502619. The reversal of 1021305502550 is 552055031201.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10213054976 + ... + 10213055075.

It is an arithmetic number, because the mean of its divisors is an integer number (158302352903).

Almost surely, 2^{1021305502550} is an apocalyptic number.

1021305502550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021305502550 is a deficient number, since it is larger than the sum of its proper divisors (878322732286).

1021305502550 is a wasteful number, since it uses less digits than its factorization.

1021305502550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20426110063 (or 20426110058 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 1021305502550 in words is "one trillion, twenty-one billion, three hundred five million, five hundred two thousand, five hundred fifty".