1000920200191 has 4 divisors (see below), whose sum is σ = 1000922795800. Its totient is φ = 1000917604584.

The previous prime is 1000920200177. The next prime is 1000920200207. The reversal of 1000920200191 is 1910020290001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000920200191 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 (1000920200101) 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, 591096 + ... + 1533373.

It is an arithmetic number, because the mean of its divisors is an integer number (250230698950).

Almost surely, 2^{1000920200191} is an apocalyptic number.

1000920200191 is a deficient number, since it is larger than the sum of its proper divisors (2595609).

1000920200191 is an equidigital number, since it uses as much as digits as its factorization.

1000920200191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595608.

The product of its (nonzero) digits is 324, while the sum is 25.

Adding to 1000920200191 its reverse (1910020290001), we get a palindrome (2910940490192).

The spelling of 1000920200191 in words is "one trillion, nine hundred twenty million, two hundred thousand, one hundred ninety-one".