1000021222191 has 8 divisors (see below), whose sum is σ = 1358519396400. Its totient is φ = 654101931392.

The previous prime is 1000021222183. The next prime is 1000021222201. The reversal of 1000021222191 is 1912221200001.

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

It is a cyclic number.

It is not a de Polignac number, because 1000021222191 - 2³ = 1000021222183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000021222111) 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, 3144720666 + ... + 3144720983.

It is an arithmetic number, because the mean of its divisors is an integer number (169814924550).

Almost surely, 2^{1000021222191} is an apocalyptic number.

1000021222191 is a deficient number, since it is larger than the sum of its proper divisors (358498174209).

1000021222191 is an equidigital number, since it uses as much as digits as its factorization.

1000021222191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6289441705.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 1000021222191 its reverse (1912221200001), we get a palindrome (2912242422192).

The spelling of 1000021222191 in words is "one trillion, twenty-one million, two hundred twenty-two thousand, one hundred ninety-one".