2001111122 has 16 divisors (see below), whose sum is σ = 3160844640. Its totient is φ = 947536128.

The previous prime is 2001111121. The next prime is 2001111131. The reversal of 2001111122 is 2211111002.

It is not an unprimeable number, because it can be changed into a prime (2001111121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110813 + ... + 127599.

It is an arithmetic number, because the mean of its divisors is an integer number (197552790).

Almost surely, 2^2001111122 is an apocalyptic number.

2001111122 is a deficient number, since it is larger than the sum of its proper divisors (1159733518).

2001111122 is a wasteful number, since it uses less digits than its factorization.

2001111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19945.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2001111122 is about 44733.7805466965. The cubic root of 2001111122 is about 1260.1543276997.

Adding to 2001111122 its reverse (2211111002), we get a palindrome (4212222124).

The spelling of 2001111122 in words is "two billion, one million, one hundred eleven thousand, one hundred twenty-two".