2001211122 has 16 divisors (see below), whose sum is σ = 4003725600. Its totient is φ = 666853152.

The previous prime is 2001211111. The next prime is 2001211127. The reversal of 2001211122 is 2211121002.

It is a junction number, because it is equal to n+sod(n) for n = 2001211098 and 2001211107.

It is not an unprimeable number, because it can be changed into a prime (2001211127) 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, 33747 + ... + 71702.

It is an arithmetic number, because the mean of its divisors is an integer number (250232850).

Almost surely, 2^2001211122 is an apocalyptic number.

2001211122 is an abundant number, since it is smaller than the sum of its proper divisors (2002514478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001211122 is a wasteful number, since it uses less digits than its factorization.

2001211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108617.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2001211122 is about 44734.8982562831. The cubic root of 2001211122 is about 1260.1753182604.

Adding to 2001211122 its reverse (2211121002), we get a palindrome (4212332124).

The spelling of 2001211122 in words is "two billion, one million, two hundred eleven thousand, one hundred twenty-two".