1021250505004 has 6 divisors (see below), whose sum is σ = 1787188383764. Its totient is φ = 510625252500.

The previous prime is 1021250504999. The next prime is 1021250505043. The reversal of 1021250505004 is 4005050521201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021250505004.

It is an unprimeable number.

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, 127656313122 + ... + 127656313129.

Almost surely, 2^{1021250505004} is an apocalyptic number.

It is an amenable number.

1021250505004 is a deficient number, since it is larger than the sum of its proper divisors (765937878760).

1021250505004 is a wasteful number, since it uses less digits than its factorization.

1021250505004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255312626255 (or 255312626253 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 1021250505004 in words is "one trillion, twenty-one billion, two hundred fifty million, five hundred five thousand, four".