2001222212211 has 64 divisors (see below), whose sum is σ = 3069991895040. Its totient is φ = 1287856765440.

The previous prime is 2001222212191. The next prime is 2001222212233. The reversal of 2001222212211 is 1122122221002.

It is a happy number.

2001222212211 is a `hidden beast` number, since 20 + 0 + 1 + 222 + 212 + 211 = 666.

It is not a de Polignac number, because 2001222212211 - 2⁵ = 2001222212179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001222232211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19119726 + ... + 19224108.

It is an arithmetic number, because the mean of its divisors is an integer number (47968623360).

Almost surely, 2^{2001222212211} is an apocalyptic number.

2001222212211 is a deficient number, since it is larger than the sum of its proper divisors (1068769682829).

2001222212211 is a wasteful number, since it uses less digits than its factorization.

2001222212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104673 (or 104667 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2001222212211 its reverse (1122122221002), we get a palindrome (3123344433213).

The spelling of 2001222212211 in words is "two trillion, one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred eleven".