1000020222191 has 8 divisors (see below), whose sum is σ = 1027052446464. Its totient is φ = 973159631640.

The previous prime is 1000020222151. The next prime is 1000020222199. The reversal of 1000020222191 is 1912220200001.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000020222191 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 (1000020222199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42896621 + ... + 42919926.

It is an arithmetic number, because the mean of its divisors is an integer number (128381555808).

Almost surely, 2^{1000020222191} is an apocalyptic number.

1000020222191 is a deficient number, since it is larger than the sum of its proper divisors (27032224273).

1000020222191 is an equidigital number, since it uses as much as digits as its factorization.

1000020222191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85816861.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1000020222191 its reverse (1912220200001), we get a palindrome (2912240422192).

The spelling of 1000020222191 in words is "one trillion, twenty million, two hundred twenty-two thousand, one hundred ninety-one".