2001211123 has 8 divisors (see below), whose sum is σ = 2032232400. Its totient is φ = 1970287488.

The previous prime is 2001211111. The next prime is 2001211127. The reversal of 2001211123 is 3211121002.

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 2001211123 - 2²¹ = 1999113971 is a prime.

It is a super-2 number, since 2×2001211123² = 8009691917637842258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2001211127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17448 + ... + 65626.

It is an arithmetic number, because the mean of its divisors is an integer number (254029050).

Almost surely, 2^2001211123 is an apocalyptic number.

2001211123 is a deficient number, since it is larger than the sum of its proper divisors (31021277).

2001211123 is an equidigital number, since it uses as much as digits as its factorization.

2001211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48821.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2001211123 is about 44734.8982674600. The cubic root of 2001211123 is about 1260.1753184703.

Adding to 2001211123 its reverse (3211121002), we get a palindrome (5212332125).

The spelling of 2001211123 in words is "two billion, one million, two hundred eleven thousand, one hundred twenty-three".