2001221182111 has 2 divisors, whose sum is σ = 2001221182112. Its totient is φ = 2001221182110.

The previous prime is 2001221182091. The next prime is 2001221182123. The reversal of 2001221182111 is 1112811221002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001221182111 - 2⁷ = 2001221181983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001221182171) 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 as a sum of consecutive naturals, namely, 1000610591055 + 1000610591056.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610591056).

Almost surely, 2^{2001221182111} is an apocalyptic number.

2001221182111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001221182111 is an equidigital number, since it uses as much as digits as its factorization.

2001221182111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 2001221182111 in words is "two trillion, one billion, two hundred twenty-one million, one hundred eighty-two thousand, one hundred eleven".