1001091102020 has 24 divisors (see below), whose sum is σ = 2131089828504. Its totient is φ = 394951009536.

The previous prime is 1001091102019. The next prime is 1001091102029. The reversal of 1001091102020 is 202011901001.

It can be written as a sum of positive squares in 4 ways, for example, as 401367863296 + 599723238724 = 633536^2 + 774418^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1001091102020.

It is not an unprimeable number, because it can be changed into a prime (1001091102029) 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, 342837959 + ... + 342840878.

It is an arithmetic number, because the mean of its divisors is an integer number (88795409521).

Almost surely, 2^{1001091102020} is an apocalyptic number.

1001091102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001091102020 is an abundant number, since it is smaller than the sum of its proper divisors (1129998726484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001091102020 is a wasteful number, since it uses less digits than its factorization.

1001091102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685678919 (or 685678917 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 1001091102020 in words is "one trillion, one billion, ninety-one million, one hundred two thousand, twenty".