1020921702189 has 8 divisors (see below), whose sum is σ = 1362329368800. Its totient is φ = 680064251856.

The previous prime is 1020921702127. The next prime is 1020921702191. The reversal of 1020921702189 is 9812071290201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020921702189 - 2⁹ = 1020921701677 is a prime.

It is a super-2 number, since 2×1020921702189² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020921702189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020925702189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137549739 + ... + 137557160.

It is an arithmetic number, because the mean of its divisors is an integer number (170291171100).

Almost surely, 2^{1020921702189} is an apocalyptic number.

It is an amenable number.

1020921702189 is a deficient number, since it is larger than the sum of its proper divisors (341407666611).

1020921702189 is a wasteful number, since it uses less digits than its factorization.

1020921702189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275108139.

The product of its (nonzero) digits is 36288, while the sum is 42.

The spelling of 1020921702189 in words is "one trillion, twenty billion, nine hundred twenty-one million, seven hundred two thousand, one hundred eighty-nine".