1001005820101 has 4 divisors (see below), whose sum is σ = 1144006651552. Its totient is φ = 858004988652.

The previous prime is 1001005820069. The next prime is 1001005820107. The reversal of 1001005820101 is 1010285001001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1001005820101 - 2⁵ = 1001005820069 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 (1001005820107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71500415715 + ... + 71500415728.

It is an arithmetic number, because the mean of its divisors is an integer number (286001662888).

Almost surely, 2^{1001005820101} is an apocalyptic number.

It is an amenable number.

1001005820101 is a deficient number, since it is larger than the sum of its proper divisors (143000831451).

1001005820101 is an equidigital number, since it uses as much as digits as its factorization.

1001005820101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143000831450.

The product of its (nonzero) digits is 80, while the sum is 19.

The spelling of 1001005820101 in words is "one trillion, one billion, five million, eight hundred twenty thousand, one hundred one".