1919000010001 has 4 divisors (see below), whose sum is σ = 1920924785332. Its totient is φ = 1917075234672.

The previous prime is 1919000009957. The next prime is 1919000010007. The reversal of 1919000010001 is 1000100009191.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1439997600001 + 479002410000 = 1199999^2 + 692100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1919000010001 is a prime.

It is a super-2 number, since 2×1919000010001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1919000010007) 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, 962386170 + ... + 962388163.

It is an arithmetic number, because the mean of its divisors is an integer number (480231196333).

Almost surely, 2^{1919000010001} is an apocalyptic number.

It is an amenable number.

1919000010001 is a deficient number, since it is larger than the sum of its proper divisors (1924775331).

1919000010001 is an equidigital number, since it uses as much as digits as its factorization.

1919000010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924775330.

The product of its (nonzero) digits is 81, while the sum is 22.

Adding to 1919000010001 its reverse (1000100009191), we get a palindrome (2919100019192).

The spelling of 1919000010001 in words is "one trillion, nine hundred nineteen billion, ten thousand, one".