1021002109975 has 12 divisors (see below), whose sum is σ = 1266083168616. Its totient is φ = 816775525280.

The previous prime is 1021002109973. The next prime is 1021002109993. The reversal of 1021002109975 is 5799012001201.

It is not a de Polignac number, because 1021002109975 - 2¹ = 1021002109973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021002109973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162009 + ... + 1438141.

It is an arithmetic number, because the mean of its divisors is an integer number (105506930718).

Almost surely, 2^{1021002109975} is an apocalyptic number.

1021002109975 is a deficient number, since it is larger than the sum of its proper divisors (245081058641).

1021002109975 is a wasteful number, since it uses less digits than its factorization.

1021002109975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308146 (or 1308141 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 37.

The spelling of 1021002109975 in words is "one trillion, twenty-one billion, two million, one hundred nine thousand, nine hundred seventy-five".