2001222200191 has 16 divisors (see below), whose sum is σ = 2045141239680. Its totient is φ = 1957862845440.

The previous prime is 2001222200189. The next prime is 2001222200227. The reversal of 2001222200191 is 1910022221002.

It is a cyclic number.

It is not a de Polignac number, because 2001222200191 - 2¹ = 2001222200189 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 (2001222200101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4337385 + ... + 4776541.

It is an arithmetic number, because the mean of its divisors is an integer number (127821327480).

Almost surely, 2^{2001222200191} is an apocalyptic number.

2001222200191 is a deficient number, since it is larger than the sum of its proper divisors (43919039489).

2001222200191 is a wasteful number, since it uses less digits than its factorization.

2001222200191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439794.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 2001222200191 its reverse (1910022221002), we get a palindrome (3911244421193).

The spelling of 2001222200191 in words is "two trillion, one billion, two hundred twenty-two million, two hundred thousand, one hundred ninety-one".